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I-4 highlighted in red
|Maintained by FDOT|
|Length||132.298 mi   (212.913 km)|
|West end||I-275 in Tampa|
|East end||I-95 / SR 400 in Daytona Beach|
|Counties||Hillsborough, Polk, Osceola, Orange, Seminole, Volusia|
Interstate 4 (I-4) is an Interstate Highway in the U.S. state of Florida, maintained by the Florida Department of Transportation (FDOT). Spanning approximately 133 miles (214 km) along a generally west–east axis, I-4 is entirely concurrent with State Road 400 (SR 400). In the west, they begin at an interchange with I-275 in Tampa. They intersect with several major expressways as they traverse Central Florida, including US 41 in Tampa; US 301 near Riverview; I-75 near Brandon; US 98 in Lakeland; US 192 in Celebration; Florida's Turnpike in Orlando; and US 17 and US 92 in multiple junctions. In the east, I-4 ends at an interchange with I-95 in Daytona Beach, while SR 400 continues for roughly another 4 miles (6.4 km) and ends at an intersection with US 1 on the city line of Daytona Beach and South Daytona.
Construction on I-4 began in 1958; the first segment opened in 1959, and the entire highway was completed in 1965.  The "I-4 Ultimate" project, currently in progress, will oversee the construction of variable-toll express lanes and numerous redevelopments through the 21-mile (34 km) stretch of highway extending from Kirkman Road (exit 75) in Orlando to SR 434 (exit 94) in Longwood. The project broke ground in 2015, and is scheduled to be completed in 2021. Previously, the median of I-4 between Tampa and Orlando was the planned route of a now-cancelled high-speed rail line.  From a political standpoint, the "I-4 corridor" is a strategic region given the large number of undecided voters in a large swing state. 
I-4 maintains a diagonal, northeast–southwest route for much of its length, although it is signed east–west.
The 132-mile-long (212 km) highway's western terminus is with an interchange with Interstate 275—known as " Malfunction Junction"—near downtown Tampa and is the starting point for mile markers and exit numbers (which are mileage-based). Just east of Malfunction Junction, I-4 passes along the north side of Tampa's Ybor City district, where a mile-long connector links to the Lee Roy Selmon Expressway (SR 618) and Port Tampa Bay. I-4 continues east past the Florida State Fairgrounds towards a turbine interchange (uncommon in the U.S.)  with Interstate 75.
After passing near the eastern suburbs of Hillsborough County—including Brandon and Plant City—it enters Polk County, where I-4 crosses along the north side of Lakeland. The Polk Parkway (SR 570) forms a semi-loop through Lakeland's southern suburbs and returns to I-4 at the Florida Polytechnic University campus, near Polk City; it does not serve as a bypass route for I-4 traffic. Just after the western junction with the Polk Parkway, I-4 turns from an eastward to a northeastward heading. Between SR 33 (at exit 38) and US 27, I-4 passes through the fog-prone Green Swamp, although the landscape beside the highway is mostly forest as opposed to water-logged swampland. Ten variable-message signs and dozens of cameras & vehicle detection systems monitor this stretch of mostly-rural highway as a result of several large, deadly pile-ups caused by dense fog.  
At mile 57, I-4 enters Osceola County and soon thereafter intersects the Orlando area's beltways: the incomplete Western Expressway (SR 429) on the western side and the Central Florida GreeneWay (SR 417) which rounds the eastern side before returning to I-4 in Sanford. Additionally, an exit to World Drive (signed as just "Disney World") runs north as a limited-access highway into the Walt Disney World Resort and an electric pylon in the shape of Mickey Mouse can be seen on the southwest corner of the intersection. The single GreeneWay/World Drive exit (Exit 62) also marks an abrupt change from rural to suburban/urban landscape. The highway passes beside Celebration and Kissimmee on the east side and Walt Disney World Resort (not visible) on the west side.
For the next 40 mi (64 km), I-4 passes through the Orlando metropolitan area, where the highway forms the main north-south artery. It enters Orange County, passes through Walt Disney World, and by SeaWorld Orlando, & Universal Orlando—and intersects all of the area's major toll roads, including the Beachline Expressway (SR 528) and Florida's Turnpike. Orlando's main tourist strip— International Drive—runs parallel and no more than 1.5 mi (2 km) from I-4 between Kissimmee and Florida's Turnpike. Between Michigan St. and Kaley Ave. (about mile 81), I-4 changes to a north heading past downtown Orlando and its northern suburbs. A 21-mile (34 km) section of I-4 from west of Kirkman Road to east of SR 434 (miles 75-96) is currently undergoing a $2.3 billion reconstruction, expected to be completed in 2021, that replaces most bridges, changes the configuration of many intersections, and adds two express toll lanes—named 4 Express—in each direction (details in the I-4 Ultimate section).  
After passing along the west side of Downtown Orlando, I-4 continues through the city's northern suburbs—including Winter Park, Maitland, Altamonte Springs, and Sanford. Around mile 91, I-4 enters Seminole County and soon thereafter shifts to a northeast heading. The Seminole Expressway (SR 417), after passing around the east side of the Orlando metropolitan area, has its northern terminus (exit 101B) at I-4 in Sanford. This intersection will also connect with the Wekiva Parkway (SR 429), currently under construction, when it is completed in 2021, at which point a full beltway (SR 429 & SR 417; concurrent with I-4 for 2 mi) around the Orlando metro area will be available.
North of Sanford, I-4 is carried by the St. Johns River Veterans Memorial Bridge over the St. Johns River at the mouth of Lake Monroe. Along the bridge, I-4 enters Volusia County and passes Deltona & DeLand. The segment north of SR 44 has been widened from four to six lanes. Completed in winter 2016-17,  the entire length of I-4 has at least 6 lanes (3+ per direction). I-4 terminates at a junction with I-95 in Daytona Beach. SR 400 continues east into Daytona Beach 4 mi to US 1.
I-4 has two pairs of rest areas, one near Polk City and the other near Longwood. At each location, there are separate facilities on opposite sides of the freeway that provide services to traffic in both directions. The rest areas all provide handicapped facilities with restrooms, picnic tables, drinking water, pet exercise areas, outside night lights, telephones, vending machines and nighttime security.   
FDOT closed a pair of rest areas at the Daryl Carter Parkway overpass (mile 70) near Lake Buena Vista in early 1999 and replaced them with retention ponds to serve runoff from an additional lane in each direction of I-4.  Another former rest area, without any bathrooms, existed on the eastbound side near milepost 127 in Volusia County. 
A pair of weigh stations including weigh in motion scales is present at mile 12 between Tampa and Plant City. They were opened in January 2009 to replace a pair just west of the SR 566 interchange at mile 19. 
I-4 was one of the first Interstate Highways to be constructed in Florida, with the first section opening between Plant City and Lakeland in 1959. By early 1960, the Howard Frankland Bridge was opened to traffic, as well as the segment from the Hillsborough Avenue/US 301 junction in Tampa to Plant City. The stretch from Lake Monroe to Lake Helen, including the original St. Johns River Bridge also opened during that period. The segment from Tampa to Orlando was complete by 1962.  By the mid 1960s, several segments were already complete, including Malfunction Junction in Tampa and parts of I-4 through Orlando. The original western terminus was set at Central Avenue ( County Road 150) in St. Petersburg,  though a non-Interstate extension would have continued south and west to Pasadena.[ citation needed] Proposed I-4 was later extended southwest to the present location of I-275 exit 20, with a planned temporary end at US 19 and 13th Avenue South,  and a continuation to the Sunshine Skyway was also designated as part of Interstate 4.  Construction was stalled at 9th Street North ( CR 803) for several years.
The entire Interstate Highway was completed by the late 1960s; however, the western terminus was truncated to Malfunction Junction in 1971 when I-75 was extended over the Frankland Bridge. Eventually, that stretch was again redesignated to become part of I-275. 
In maps and atlases dating to the 1950s, 1960s, and 1970s, the Tampa–St. Petersburg section of I-4/I-275 was marked as the Tampa Expressway. The Orlando segment was marked as the Orlando Expressway. Both names have since faded from maps.
Although many post-1970 interchanges along I-4 were constructed before the recent widening projects, they were designed with I-4 expansion in mind. In other words, there is enough room available to widen I-4 to up to ten lanes without extensively modifying the interchanges. Some of these interchanges include the I-75 stack (constructed in the 1980s) and several interchanges serving the Walt Disney World Resort (constructed in the late 1980s and early 1990s).
A section of I-4 between Daytona Beach and Orlando called the "dead zone" is rumored to be haunted.  In 2010, the ECFRPC using GIS technology performed an analysis to determine if this identified zone had an increased fatality rate related to crashes. The analysis which compared this section of I-4 to several other dangerous I-4 sections found that while the dead zone area did not have the highest accident or fatality rate, it did identify that the percentage of fatality to accident was significantly higher in this location.
The median of I-4 between Tampa and Orlando was slated to be used for the Florida High Speed Rail line between those cities. As a result of a state constitutional amendment to build a high speed rail system between its 5 largest cities passed by voters in 2000, construction projects on I-4 included a wide median to accommodate a high speed rail line. The high speed rail project was cancelled in 2004, but revived again in 2009. In 2010, the federal government awarded Florida over $2 billion—nearly the entire projected construction cost—to build the line, with work on the project to begin in 2011 and be completed by 2014. However, Governor Rick Scott's rejection of the funding ended the project. 
On January 9, 2008, 70 vehicles were involved in a large pileup on I-4 near Polk City. The pileup was caused by an unexpected thick morning fog that was mixed with a scheduled—and approved—environmental burn by the Florida Fish and Wildlife Conservation Commission. The fog drifted across I-4, mixing with the smoke, reducing visibility to near-zero conditions. Four people were killed, and 38 were injured. The section of I-4 did not re-open until the next day, January 10. 
The I-4/I-275 interchange (Malfunction Junction) was rebuilt from 2002 to 2007,  and I-4 has been widened from four to six lanes (with eight lanes in certain segments). Eventually, I-4 will be widened again to a total of at least ten lanes (five in each direction). Studies for this project are already underway and construction should commence sometime in the 2010s. Completion of the project should be around 2020.[ citation needed]
Eastbound I-4 shifted to its new, permanent alignment between Malfunction Junction and 50th Street on August 8, 2006. The new alignment includes a right-lane ramp exit/entry at the 22nd St/21st St Interchange (The previous left-lane configuration was causing hazardous conditions to commuters since its opening in 2005). On August 11, 2006, a fourth lane opened on eastbound I-4 between the downtown junction and 50th Street (led in by a newly opened third lane on the eastbound I-4 ramp from northbound I-275). And on August 18, the new westbound alignment, just west of 50th Street, opened. The newly opened lanes will improve flow throughout the interchange. The 50th Street overpass, however, would not be complete until late 2007.     Also, the eastbound I-4 exit ramp to Columbus Drive/50th Street is situated to the left-hand side of the highway (as opposed to its former right-hand side exit). This exit shift went into effect in spring 2006 and is part of the new, permanent interstate configuration.
In Tampa, the exit to 40th Street ( SR 569), exit 2, was closed and demolished in late 2005 due to the ongoing reconstruction of I-4 and to accommodate a proposed connector highway with the Lee Roy Selmon Expressway. 
The interchange with what is today I-75 was constructed in the early 1980s.
As Orlando grew in the 1970s and 1980s, traffic became a growing concern, especially after the construction of the original interchange with the East–West Expressway in 1973, which proved to become a principal bottleneck. The term "highway hostages" was coined in the 1980s to describe people stuck in long commutes to and from Orlando on I-4.[ citation needed]
In the early-to-mid 1990s, several interchanges near Kissimmee were constructed or upgraded to accommodate increasing traffic going to and from Walt Disney World. However, I-4's main lanes were not widened in the process. Around the same time, SR 417 was extended to I-4.[ citation needed] Improvements to the US 192 junction were completed in 2007. 
During the early 2000s, tolled express lanes were being planned in the Orlando area as a traffic congestion relief technique for rush hour commuters. The name for them was to be Xpress 400, numbered after the state road designation for I-4. The express lanes were slated to extend from Universal Orlando, east to SR 434 in Longwood, and tolls were to be collected electronically via transponders like SunPass and Orlando-Orange County Expressway Authority's E-Pass, with prices dependent on the congestion of the eight main lanes. However, the project was effectively banned by the passage of the SAFETEA-LU Federal transportation bill in 2005, introduced by U.S. Representative John Mica. The plan for tolled express lanes is now moving forward as part of the $2.3 billion I-4 Ultimate project (see "I-4 Ultimate" section below).
Interim improvements to the interchange at SR 408 were completed at the end of 2008.  The eastbound exit to Robinson Street ( SR 526) permanently closed on April 25, 2006, to make way for construction of the new eastbound onramp from SR 408.  The westbound offramp to Gore Street was permanently closed in the same project on November 2, 2008.
A $2.3 billion (in year-of-expenditure dollars) project—dubbed I-4 Ultimate—is reconstructing a 21-mile (34 km) stretch of I-4 through Orlando from SR 435 (exit 75) east to SR 434 (exit 94).  The most noticeable change will be the addition of four variable-toll express lanes along this section, to be called 4 Express. The express lanes will be variably tolled in an attempt to maintain an average speed of 50 miles per hour (80 km/h). Additionally, the general-use lanes will be rebuilt, 15 major interchanges will be reconfigured, 53 new bridges will be added, and 75 bridges will be replaced.  Two pedestrian bridges will be built over the highway near Kirkman Road and Maitland Boulevard.  The project will also reduce the curve radius and improve line-of-sight along the notorious Fairbanks Curve south of Fairbanks Avenue, which is the most accident-prone section of I-4.  
FDOT proposed adding barrier-separated HOV lanes to I-4 through the Orlando metro area in the 1990s, possibly funded by tolls,   but proposals for express lanes (including reversible toll lanes and HOT lanes) were blocked by politics for the next 15 years. In 2012, a legislative ban on tolls along I-4, which had been in place for seven years, ended and FDOT began soliciting private enterprises to build and help finance the project in a public-private partnership.  In February 2013, the state legislature and governor gave approval for FDOT to proceed with the public-private partnership on this section of I-4 in February 2013  and the following year, FDOT selected I-4 Mobility Partners to design, construct, finance, maintain and operate the project for 40 years. FDOT and I-4 Mobility Partners reached commercial and financial close and a public-private partnership concession agreement was executed in September 2014.  The final design phase began in October 2014.  On February 1, 2015, FDOT turned the project over to I-4 Mobility Partners  and on February 18, transportation officials and the governor held a groundbreaking ceremony for the project in Maitland.  I-4 Mobility Partners has a March 2021 deadline to complete the project. 
Extensions of the 4 Express toll lanes both southwest and northeast of the I-4 Ultimate project are being considered. In 2013, FDOT initiated a reevaluation study to reevaluate previous feasibility studies, made between 1998 and 2005, in which the addition of HOV or express toll lanes were considered.   The extensions cover approximately 40 miles (64 km) of I-4 through the Orlando metro area. Southwest of the I-4 Ultimate, the study is examining an extension through Osceola County to US 27 in Polk County. Northeast of the I-4 Ultimate, the study is examining an extension through Seminole County to SR 472 in Volusia County. The reevaluation is expected to be complete in July 2015. 
Express toll lanes are also being considered for I-4 in the Tampa Bay area. In January 2015, FDOT unveiled its master plan for a system of express toll lanes—dubbed Tampa Bay Express (TBX)—on I-4, I-75, and I-275 and began public meetings for community input.  On I-4, these lanes would extend approximately 26 miles (42 km) from I-275 to west of the Polk Parkway (SR 570). At the junction with I-275, the initial concept alignment calls for a direct connection between the express toll lanes of both highways.  Express bus lanes for regional, long distance bus service were studied for inclusion in the plan. The I-4 corridor was considered in the bus lane study,  but the resultant proposal only included installation on I-275 and I-75 
This section needs to be updated.(November 2016)
Connections with two new expressways are planned. The Wekiva Parkway—a 25-mile (40 km) segment of SR 429—will connect to SR 417 at the I-4 interchange in Sanford. When completed in 2022, it will complete the beltway around Orlando, although the southern ends of SR 429 and SR 417 do not connect and are separated by a 3.4-mile (5.5 km) drive along I-4.  The Central Polk Parkway is a planned tolled expressway in eastern Polk County that will connect I-4 near Davenport with the Polk Parkway near Bartow; it is currently in the design phase, but funding for right-of-way acquisition of the initial segments is not planned until fiscal year 2019/20.  Additionally, FDOT is conducting a feasibility study for a 5–11.5-mile (8.0–18.5 km)  connection between I-4 and the Poinciana Parkway—a short, tolled expressway completed in 2016 between US 17/US 92 and the community of Poinciana.  
The final four-lane segment of I-4, from SR 44 to I-95, was widened to six lanes. Completed in winter 2016-17, the whole highway is at least six lanes wide. 
In 2014, the Florida Department of Transportation began a study of the feasibility of extending the SunRail commuter train line to Daytona Beach, primarily focusing on the use of the I-4 median. The ongoing widening project from SR 44 to I-95 maintains a median wide enough to accommodate a future rail line. 
|County||Location||mi  ||km||Old exit||New exit||Destinations||Notes|
|Hillsborough||Tampa||0.000||0.000||—||—||I-275 ( SR 93) – St. Petersburg, Ocala, Tampa International Airport||Westbound splits into 3 ramps: Northbound & southbound I-275 and "Exit 45A" (in reference to the I-275 exit number)/"Downtown East-West", which joins the southbound I-275 Exit 45A ramp without joining the southbound I-275 mainline.|
|1.154||1.857||1||1||22nd Street / 21st Street – Cruise Ships, Ybor City National Historic Landmark District||former SR 585|
SR 618 (Selmon Expressway) / US 41 Bus. (20th Street) – Brandon, Port Tampa Bay
|I-4–Selmon Expressway Connector (left exits, both directions); access to or from SR 618 only in the same direction; US 41 Bus. (trucks only, signed only as "Port Tampa Bay") access from westbound I-4 and to eastbound I-4|
|2.463||3.964||2||2||SR 569 (40th Street)||Former interchange|
|3.266||5.256||3||3||US 41 (50th Street / SR 599) / Columbus Drive||Eastbound left exit and westbound left entrance; eastbound right entrance and westbound left entrance|
|||4.706||7.574||4||5||SR 574 (Martin Luther King Jr. Boulevard)|
|||5.573||8.969||5||6||Orient Road||Eastbound exit and westbound entrance|
|||6.683||10.755||6||7||US 92 ( Hillsborough Avenue / SR 600) / US 301 ( SR 41) – Riverview, Zephyrhills, Busch Gardens, Tampa Executive Airport, State Fairgrounds||Access to/from US 92 east eastbound; Access to/from US 92 west westbound; Access to US 301 both directions|
|||8.610||13.856||7||9||I-75 (SR 93A) – Ocala, Naples, Brandon, Temple Terrace||I-75 exit 261|
|Mango||10.142||16.322||8||10||CR 579 (Mango Road) – Mango, Thonotosassa|
|Dover||13.876||22.331||9||14||McIntosh Road – Dover|
|17.434||28.057||10||17||Branch Forbes Road – Dover||Serves Dinosaur World|
|Plant City||19.518||31.411||11||19||SR 566 (Thonotosassa Road)|
|21.280||34.247||13||21||SR 39 (Alexander Street) / CR 39 (Buchman Highway)||Alexander Street was originally old exit 12, but was combined with 13; access to South Florida Baptist Hospital|
|22.596||36.365||14||22||Park Road ( SR 553)||SR 553 not signed|
|Lakeland||25.563||41.140||15||25||County Line Road|
|Polk||26.530||42.696||15A||27||SR 570 east (Polk Parkway) – Lakeland, Winter Haven, Bartow|
|28.365||45.649||16||28||To US 92 ( SR 546/Memorial Boulevard) – Lakeland||SR 546 not signed|
|30.675||49.367||17||31||SR 539 ( CR 35A north/Kathleen Road) – Kathleen, Lakeland|
|32.003||51.504||18||32||US 98 ( SR 35 / SR 700) – Lakeland, Dade City|
|33.440||53.816||19||33||SR 33 (Lakeland Hills Boulevard) / CR 582 (Socrum Loop Road) – Lakeland||Eastbound exit/entrance with SR 33 only (signed "SR 33"); westbound exit/entrance with CR 582 only (signed "CR 582"/"To SR 33")|
|41.223||66.342||20A||41||SR 570 west (Polk Parkway) – Auburndale, Lakeland||Serves Florida Polytechnic University (southwest corner of interchange).|
|||43.981||70.781||21||44||SR 559 – Polk City, Auburndale||Serves Fantasy of Flight|
|||47.982||77.220||22||48||CR 557 (Old Grade Road) – Lake Alfred, Winter Haven|
|Four Corners||54.733||88.084||23||55||US 27 ( SR 25) – Haines City, Clermont||Serves Legoland and Heart of Florida Regional Medical Center|
|Osceola||57.723||92.896||24||58||CR 532 (Champions Gate Boulevard/Osceola-Polk Line Road) – Poinciana, Kissimmee|
|59.663||96.018||—||60||SR 429 north (Western Expressway) – Apopka|
|Celebration||61.781||99.427||24C-D-E||62||SR 417 north (Central Florida GreeneWay) – Disney World, Celebration, International Airport, Sanford||Collector/distributor lanes serve two junctions with one exit. Full interchange with World Drive. Eastbound exit to SR 417. Westbound entrance from SR 417.|
|64.165||103.264||25A-B||64||US 192 ( SR 530/Irlo Bronson Memorial Highway) – Kissimmee, Magic Kingdom, Hollywood Studios||Access to Florida Hospital Celebration Health|
|65.322||105.126||26C-D||65||Osceola Parkway ( CR 522) – Animal Kingdom, Wide World of Sports|
|Orange||Lake Buena Vista||66.565||107.126||26A-B||67||SR 536 east (Epcot Center Drive/World Center Drive) to SR 417 north – Epcot, Disney Springs|
|68.107||109.608||27||68||SR 535 – Kissimmee, Lake Buena Vista|
|Williamsburg||70.983||114.236||27A||71||Sea World (Central Florida Parkway)||Eastbound exit and westbound entrance|
|71.744||115.461||28||72||SR 528 east (Beachline Expressway) – Orlando International Airport, Cape Canaveral|
|Orlando||73.732||118.660||29A||74A||SR 482 (Sand Lake Road) / International Drive|
|75.246||121.097||29B||74B||Universal (Adventure Way)||Westbound exit and entrance|
|75.246||121.097||30||75||SR 435 (Kirkman Road) / International Drive – Universal||Signed as exits 75A (south) and 75B (north); serves Volcano Bay and Fun Spot America|
|76.359||122.888||31||77||Florida's Turnpike (SR 91) – Miami, Ocala||Turnpike exit 259|
|77.760||125.143||31A||78||Conroy Road||Serves The Mall at Millenia, Holy Land Experience|
|79.147||127.375||32||79||CR 423 (John Young Parkway)|
|80.474||129.510||33||80||US 17 / US 92 / US 441 ( Orange Blossom Trail / SR 500 / SR 600)||Signed as exits 80A (south/west) and 80B (north/east) eastbound; previously signed as exits 33A and 33B accordingly; westbound is a left exit, signed as exit 80 and only providing south/west access|
|81.004||130.363||34 and 81A||81||To US 17 north / US 92 east / US 441 north / Michigan Street||Westbound exit and eastbound entrance|
|81.469||131.112||35||81BC||Kaley Avenue||Eastbound exit and entrance; westbound ramps closed in 2015; access to Orlando Regional Medical Center, Arnold Palmer Hospital for Children, and Winnie Palmer Hospital for Women & Babies|
|82.116||132.153||36||82A||SR 408 (East–West Expressway)|
|82.235||132.344||37||82B||Gore Street||Former westbound-only interchange; westbound entrance remains|
|82.636||132.990||38||82B||Anderson Street / South Street||South Street signed eastbound; Anderson Street signed westbound; To Amway Center, History Center; formerly signed as exit 82C|
|82.78||133.22||39||83||South Street||Closed interchange; no eastbound exit|
|83.30||134.06||40||83A||SR 526 (Robinson Street)||Former interchange; eastbound exit and westbound entrance|
|83.792||134.850||41||83A||US 17 / US 92 / SR 50 (Colonial Drive / SR 600) / Amelia Street – Bob Carr||Signed as exit 83A westbound; formerly signed as exit 83B eastbound|
|84.279||135.634||42||84||Ivanhoe Boulevard||Westbound exit (signed as exit 84B westbound), eastbound entrance; eastbound exit closed in 2015|
|85.135||137.012||43||85||Princeton Street||Access to Florida Hospital Orlando|
|85.890||138.227||44||86||Par Street||Eastbound exit and westbound entrance|
|Winter Park||86.789||139.673||45||87||Fairbanks Avenue ( SR 426)||Temporarily moved to miles back from original spot, merging with exit 86-Par Street|
|87.767||141.247||46||88||SR 423 (Lee Road / US 17 Truck south / US 92 Truck west)||Western end of US 17 Truck / US 92 Truck overlap; serves Eatonville|
|Maitland||89.491||144.022||47||90||SR 414 (Maitland Boulevard / US 17 Truck north / US 92 Truck east)||Eastern end of US 17 Truck / US 92 Truck overlap; signed as exits 90A (east) and 90B (west)|
|Seminole||Altamonte Springs||91.631||147.466||48||92||SR 436 – Altamonte Springs, Apopka||Access to Florida Hospital Altamonte|
|Longwood||93.613||150.656||49||94||SR 434 – Longwood, Winter Springs|
|Lake Mary||98.400||158.359||50||98||Lake Mary, Heathrow, Orlando Sanford International Airport (Lake Mary Boulevard)|
|100.628||161.945||51A||101A||CR 46A – Sanford, Heathrow|
|Sanford||101.366||163.133||—||101B||SR 417 south (Seminole Expressway) – International Airports ( Sanford, Orlando), Sanford|
|102.505||164.966||51||101C||SR 46 – Mount Dora, Sanford Historic District|
|||103.997||167.367||52||104||US 17 / US 92 ( SR 15 / SR 600) – Sanford||Access to Central Florida Regional Hospital|
|St. Johns River ( Lake Monroe)||St. Johns River Veterans Memorial Bridge|
|107.821||173.521||53||108||DeBary, Deltona ( CR 4162)|
|110.636||178.051||53C||111||Deltona, Orange City, DeBary ( CR 4146)||Signed as exits 111A (Deltona) and 111B (Orange City, DeBary); previously signed as exits 53CA and 53CB accordingly; access to Florida Hospital Fish Memorial|
|113.783||183.116||54||114||SR 472 – Deltona, DeLand|
|Lake Helen||115.898||186.520||55||116||DeLand, Lake Helen Historic District ( CR 4116)|
|DeLand||118.456||190.636||56||118||SR 44 – New Smyrna Beach, DeLand Historic District||Signed as exits 118A (east) and 118B (west)|
|Daytona Beach||129.131||207.816||57||129||US 92 east ( SR 600) – Daytona Beach||Eastbound exit and westbound entrance; access to Daytona Beach International Airport and Halifax Health Medical Center|
|131.987||212.412||—||132||I-95 ( SR 9) – Daytona Beach, Jacksonville, Miami||I-95 exit 260B; signed as exits 132A (north) and 132B (south)|
|132.298||212.913||58, 132||—||SR 400 east – South Daytona|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
|Location||Tampa– Daytona Beach|
|Length||136.514 mi   (219.698 km)|
State Road 400 (SR 400) is an unsigned highway while running concurrently with I-4 from their shared western terminus at I-275 in Tampa through the eastern terminus of I-4 at I-95 in Daytona Beach. SR 400 is named Beville Road beyond that point and continues for another four miles (6.4 km) to its own eastern terminus at an intersection with US 1 on the city line between Daytona Beach and South Daytona. Sections of the non-concurrent SR 400 are classified as a "scenic thoroughfare" within Daytona Beach. 
The entire route is in Volusia County.
|Daytona Beach||0.000||0.000|| I-4 west –
I-95 – Jacksonville
|Eastern end of I-4 overlap, exit 132 westbound; I-95 exit 260A|
|0.271||0.436||CR 4009 (Williamson Boulevard) – International Airport|
|2.181||3.510||SR 483 north / CR 483 south (Clyde Morris Boulevard) – Embry Riddle University, Daytona State College, University of Central Florida|
|2.852||4.590||SR 5A (South Nova Road) – Museum, Bethune Cookman University|
|4.216||6.785||US 1 (South Ridgewood Avenue) – Daytona Beach, South Daytona, Convention Center|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
|2016||50.6% 1,289,387||44.7% 1,161,468||3.68% 95,768|
|2012||52.6% 953,186||46.2% 838,377||1.2% 21,907|
|2008||53.3% 946,929||45.7% 811,159||1.0% 17,034|
|2004||46.5% 724,618||52.9% 824,887||0.6% 9,929|
|2000||48.0% 569,746||49.7% 590,030||2.2% 26,531|
|1996||45.7% 462,403||44.7% 451,902||9.6% 96,818|
|1992||37.5% 379,821||42.1% 426,297||20.3% 205,621|
In the 2004 U.S. presidential election, the I-4 corridor, a commonly used term to refer to the counties in which Interstate 4 runs through and a site of significant population growth, was a focus of political activity within the swing state of Florida. Communities along the I-4 corridor were perceived by both major political parties as having higher proportions of undecided voters as compared to more Republican- or Democratic-leaning portions of the state. It played an equally key role in the 2008 U.S. presidential election, but whereas the corridor had voted heavily for George W. Bush in 2004, which helped Bush win the state, in 2008 it swung behind Democratic candidate Barack Obama, helping Obama win Florida. 
The I-4 corridor previously voted for the statewide winner from 1996 to 2012. However, in the 2016 election, Republican Donald Trump carried the state, and won the presidency without winning the region. The Republicans carried the region three times while the Democrats carried the region four times in the past seven presidential elections. Republicans George H. W. Bush and George W. Bush won more votes than other candidates in 1992, 2000, and 2004, while Democrats Bill Clinton, Barack Obama, and Hillary Clinton captured the region's vote total in the elections of 1996, 2008, 2012, and 2016.
- Hurricane Charley, sometimes referred to as the "I-4 Hurricane"
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The turbine design, which is rare in the United States, is a first of its kind in North Carolina; another notable example exists at the interchange of I-4 and I-75 in Tampa, Florida.
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"One Year After Tragic I-4 Pileup, Questions Remain". Lakeland Ledger. p. 2. Retrieved August 19, 2014.
The Florida Department of Transportation is in the process of installing 10 electronic signs...The system will also include a series of 22 cameras, which can be rotated, and 77 vehicle-detection systems, which will observe the amount of traffic and speed of the vehicles.
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"City Buzzes at Interstate Impact on 1,600 Parcels". The Evening Independent. Jacksonville, FL. p. 2A. Retrieved March 13, 2014; Subsequent articles:
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|Wikimedia Commons has media related to Interstate 4.|
FDOT websites about Interstate 4:
- Tampa Bay Interstates—current, future, and past (since 1999) projects on I-4
- Central Florida Roads—current and future projects on I-4 in Osceola, Orange, Seminole, and Volusia counties
FDOT websites about specific I-4 projects and proposals:
- I-4 Ultimate—project info about I-4 Ultimate in the Orlando area
- I-4 Beyond the Ultimate—information about a proposed extension of express lanes southwest of the I-4 Ultimate project through Osceola and Polk counties.
- Tampa Bay Express—information about the proposed express lanes on Interstates 4, 75, & 275 in the Tampa Bay area.
- I-4 Poinciana Parkway Connector—information about a feasibility study being conducted for a connection between I-4 and the Poinciana Parkway