# Interstate 64 in Illinois

Interstate 64 (I-64) in the US state of Illinois is a major east–west Interstate Highway that runs through southern Illinois from the St. Louis metropolitan area east to the Indiana state line near Grayville, Illinois. It travels a distance of 130.4 miles (209.9 km).

## Route description

I-64 enters Illinois running concurrently with I–55 and U.S. Route 40 (US 40) over the Mississippi River on the Poplar Street Bridge. After splitting from these highways in East St. Louis, I-64 turns southeasterly and proceeds through St. Clair County towards the Belleville area traveling through the eastern/southeastern St. Louis suburbs of Caseyville, Fairview Heights, O'Fallon, and Shiloh. In Shiloh, the Interstate skirts the northern edge of Scott Air Force Base and MidAmerica St. Louis Airport and provides access to Mascoutah and Lebanon via Illinois Route 4 (IL 4). A new interchange at Rieder Road was completed in September 2017 to create better access to Scott Air Force Base. As part of the new interchange, a third lane in each direction, a wide left shoulder to accommodate a future fourth lane in each direction, and a center Jersey barrier was added from one mile (1.6 km) west of Air Mobility Drive/IL 158 to Rieder Road.
At the St. Clair–Clinton county line, the Interstate passes the exurb of New Baden, after which it crosses the southern boundary of Clinton County and leaves the St. Louis metropolitan area. It then traverses a rural part of Illinois through Washington and Jefferson counties, which has no adjacent cities or major intersections passing; it reaches the city of Mount Vernon in Jefferson County, where it has a short concurrency with I-57. Mount Vernon is the only major city and intersection served by I-64 in Illinois outside of the St. Louis metropolitan area. Past Mount Vernon, the Interstate enters another rural stretch through parts of Jefferson, Wayne, and White counties before crossing the Wabash River into Indiana.

## History

Starting in 1970, a small portion of I-64 opened just west of the Indiana state line. In 1973, another small portion opened just south of Mount Vernon. By 1975, two portions of I-64 (from IL 4 to I-57 and IL 111 to IL 159) opened. By 1977, the rest of the route opened. As a result of the completion, US 460 was completely removed from Illinois.

## Exit list

| County | Location | mi | km | Exit | Destinations | Notes |
| Mississippi River | Mississippi River | 0.0 | 0.0 | | I-55 south / I-64 west / US 40 west – St. Louis | Continuation into Missouri |
| Poplar Street Bridge Illinois–Missouri line |||
| St. Clair | East St. Louis | 0.6 | 0.97 | 1 | IL 3 south / Great River Road – Cahokia | Western end of IL 3/GRR concurrency; exit includes direct exit ramp onto 13th Street / Tudor Avenue |
| St. Clair | East St. Louis | 0.9 | 1.4 | 2A | Third Street – Eads Bridge, Casino Queen | Westbound exit and eastbound entrance |
| St. Clair | East St. Louis | 1.3 | 2.1 | 2B-C | Martin Luther King Bridge – Downtown St. Louis | Signed as exits 2B (left exit) and 2C (right exit); no eastbound exits |
| St. Clair | East St. Louis | 2.5 | 4.0 | 3A | I-55 / Great River Road north / US 40 east to I-70 east – Chicago, Indianapolis | Eastern end of I-55/US 40/GRR concurrency; exit unnumbered eastbound; I-55 north exit 3, south exit 3A |
| St. Clair | East St. Louis | 2.6 | 4.2 | 3B | I-70 west (Dwight D. Eisenhower Highway) to IL 3 north – Kansas City | Westbound exit and eastbound entrance; I-70 exit 3 |
| St. Clair | East St. Louis | 2.7 | 4.3 | 3 | IL 3 north (St. Clair Avenue) | Eastern end of IL 3 concurrency; no westbound exit |
| St. Clair | East St. Louis | 3.3 | 5.3 | 4A | Baugh Avenue / 18th Street | Westbound exit and entrance |
| St. Clair | East St. Louis | 4.2 | 6.8 | 4B | 25th Street | |
| St. Clair | Washington Park | 5.8 | 9.3 | 6 | IL 111 (Kingshighway) | |
| St. Clair | Caseyville | 7.1 | 11.4 | 7 | I-255 / US 50 west – Memphis, Chicago | Western end of US 50 concurrency; I-255 exit 20 |
| St. Clair | Caseyville | 8.4 | 13.5 | 9 | IL 157 (Bluff Road) – Caseyville, Centreville | |
| St. Clair | Fairview Heights | 12.0 | 19.3 | 12 | IL 159 (Illinois Street) – Belleville, Collinsville | |
| St. Clair | O'Fallon | 14.2 | 22.9 | 14 | Old US Highway 50 – O'Fallon | |
| St. Clair | O'Fallon | 15.7 | 25.3 | 16 | Green Mount Road – O'Fallon, Shiloh | |
| St. Clair | O'Fallon | 18.6 | 29.9 | 19 | US 50 east / IL 158 west (Air Mobility Drive) – Carlyle, Scott Air Force Base | Eastern end of US 50 concurrency; northern terminus of IL 158; signed as exits 19A (west) and 19B (east) |
| St. Clair | O'Fallon | | | 21 | Rieder Road | Completed in 2017 |
| St. Clair | Mascoutah | 22.6 | 36.4 | 23 | IL 4 – Mascoutah, Lebanon | Serves MidAmerica St. Louis Airport |
| St. Clair | New Baden | 27.1 | 43.6 | 27 | IL 161 – New Baden | |
| Clinton | Looking Glass Township | 34.2 | 55.0 | 34 | Albers | |
| Washington | Okawville Township | 40.4 | 65.0 | 41 | IL 177 – Okawville | |
| Washington | Nashville | 49.8 | 80.1 | 50 | IL 127 – Carlyle, Nashville | |
| Washington | Richview Township | 60.7 | 97.7 | 61 | US 51 – Centralia, Ashley | |
| Jefferson | Casner–Shiloh township line | 68.6 | 110.4 | 69 | Woodlawn | |
| Jefferson | Mount Vernon | 73.3 | 118.0 | 73 | I-57 north – Chicago | Western end of I-57 concurrency, exit 96 on I-57 |
| Jefferson | Mount Vernon | 74.8 | 120.4 | 95 | IL 15 – Mount Vernon, Ashley | Exit numbers follow I-57; serves Mount Vernon Outland Airport |
| Jefferson | Mount Vernon | 75.8 | 122.0 | 94 | Veterans Memorial Drive | |
| Jefferson | McClellan Township | 78.0 | 125.5 | 78 | I-57 south to I-24 – Memphis, Nashville | Eastern end of I-57 concurrency; exit 92 on I-57. Access to Rend Lake |
| Jefferson | Dodds Township | 79.7 | 128.3 | 80 | IL 37 – Mount Vernon | |
| Jefferson | Pendleton Township | 88.5 | 142.4 | 89 | Belle Rive, Bluford | |
| Wayne | Orel Township | 99.3 | 159.8 | 100 | IL 242 – Wayne City | |
| Wayne | Barnhill Township | 110.1 | 177.2 | 110 | US 45 – Mill Shoals | |
| White | Burnt Prairie Township | 116.7 | 187.8 | 117 | CR 20 – Burnt Prairie | |
| White | Grayville | 129.4 | 208.2 | 130 | IL 1 – Grayville, Carmi | |
| Wabash River | Wabash River | 130.4 | 209.9 | | I-64 east – Evansville, Louisville | Continuation into Indiana |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus Incomplete access |||||||