Interstate 4 (I-4): Tampa to Daytona Route, Safety and Tolls

How long is I-4?

The FHWA Route Log gives I-4 131.89 miles as of January 2026, every one of them in Florida. Wikipedia and Interstate Guide both print a slightly longer 132.30 miles.

The Route Log books no shared pavement on I-4, so an overlap with another route does not explain the 0.41-mile gap, and neither source says where it comes from. The whole road also carries the number State Road 400, which is not signed along I-4 and runs about 4 miles past its eastern end to US 1.

Where I-4 starts and ends

The western end is the downtown Tampa interchange with I-275, known locally as Malfunction Junction, where the mileposts and exit numbers begin. The eastern end is the junction with I-95 near Daytona Beach.

The signs say east and west, but the road runs southwest to northeast through six counties: Hillsborough, Polk, Osceola, Orange, Seminole and Volusia. It passes Plant City, Lakeland, Kissimmee, Orlando, Altamonte Springs, Sanford, Deltona and DeLand. East of SR 44, a 9.6-mile stretch with no exits crosses Deep Creek Swamp and Tiger Bay State Forest.

Interstate junctions along I-4

Two main Interstates meet I-4, listed from Tampa east. I-75 crosses at a turbine interchange in Mango, and I-95 meets it at the Daytona Beach end. I-275, where the route starts, has three digits and so is not in this list. The other big interchanges are with state highways: the Selmon Expressway connector near Ybor City, the Polk Parkway around Lakeland, Florida's Turnpike and SR 408 in Orlando, and SR 417 and SR 429 on the Orlando beltway.

Fatal crashes on I-4

From 2020 to 2024, 156 fatal crashes on I-4 killed 167 people, about 33 a year. Over 131.89 miles that comes to 25.3 deaths per 100 route miles each year, more than two and a half times the Interstate average of 9.5. I-4 ranks second of the 56 routes long enough to rank; only I-45 is higher.

Hillsborough County, at the Tampa end, had the most deaths with 47. Polk followed with 34 and Orange with 32, then Volusia with 23 and Osceola with 18. The yearly count peaked at 47 in 2021 and has fallen every year since, to 21 in 2024.

Wikipedia, citing FDOT, names the Fairbanks Curve as the most accident-prone section of I-4, and the I-4 Ultimate project rebuilt it. Weather is a hazard too: on January 9, 2008, fog mixed with smoke from a planned burn set off a 70-vehicle pileup near Polk City that killed four people and injured 38.

Counties with the most I-4 crash deaths

Bridges on I-4

None of the 156 bridges that carry the I-4 main line rate Poor in the 2025 National Bridge Inventory. Of the 156, 115 rate Good and 41 Fair. Half were built in 2007 or later. Only I-11, I-42 and I-41 have a younger median in our data, and I-73 ties it.

In Orlando, the I-4 Ultimate project built 53 new bridges and replaced 75 more along its 21 miles. Farther east, the current St. Johns River Veterans Memorial Bridge, which takes I-4 over the river at Lake Monroe, was completed in 2004.

Tolls on I-4

FHWA's January 2023 toll inventory has a single entry for I-4: the I-4 Ultimate express lanes, filed under the Florida Department of Transportation, from west of Kirkman Road in Orange County to east of SR 434 in Seminole County. Signed as I-4 Express, they are two lanes each way in the median. They opened on February 26, 2022, and tolls were set to begin on March 3.

Nothing else on I-4 appears in the inventory, so a driver who stays in the regular lanes from Tampa to Daytona Beach pays no toll. The express lanes are optional, and their price changes by segment through the day as traffic rises and falls. They accept SunPass, E-ZPass, E-PASS and several other transponders, offer no cash or toll-by-plate billing, and are closed to vehicles with three or more axles. The introductory rate for the full length was $3.50 eastbound and $3.00 westbound. FHWA records the facility as 20.58 miles, close to the 21 miles the operator quotes.

More express lanes are planned. FDOT's I-4 Beyond the Ultimate plan covers about 40 more miles, southwest toward US 27 in Polk County and northeast toward SR 472 in Volusia County. Its first pieces, in Osceola County, now fall under the Moving I-4 Forward program, and in April 2026 FDOT awarded a $582 million contract for two express lanes each way on 3.1 miles east of CR 532. Near Tampa, FDOT's 2015 Tampa Bay Express plan, since renamed Tampa Bay Next, proposed express lanes from I-275 to west of the Polk Parkway.

How I-4 was built and rebuilt

I-4 was designated on August 14, 1957. Construction began in 1958, the first stretch opened between Plant City and Lakeland in 1959, and the Tampa to Orlando section was finished by 1962. Wikipedia dates completion of the whole road to 1965; Interstate Guide gives 1966.

The route used to reach St. Petersburg. As first planned, I-4 continued southwest from downtown Tampa across the Howard Frankland Bridge, dedicated on January 15, 1960. Federal approval of the I-75 extension to Miami in January 1969 put that stretch under I-75. I-4 was cut back to the downtown Tampa interchange in 1971, and the old route through St. Petersburg became I-275 in 1973.

The big rebuild came in Orlando. I-4 Ultimate reconstructed about 21 miles from Kirkman Road to SR 434 for $2.3 billion, starting February 18, 2015, under a public-private partnership with I-4 Mobility Partners. In April 2025, the Moving Florida Forward program finished adding a lane each way from US 27 in Polk County east into Osceola County. At the other end, a $227.5 million rebuild of the I-275 interchange in Tampa is scheduled to wrap up in spring 2027.

I-4 traffic and road conditions

I-4 stays in one state, so one traveler site covers all of it. Florida's 511 service below has current crashes, lane closures and construction from Tampa to Daytona Beach.

I-4 questions