Interstate 64
U.S. Route 40
I-64 highlighted in red
Route information
Maintained by MoDOT
Length	40.817 mi[1] (65.689 km)
Existed	1987–present
NHS	Entire route
Major junctions
West end	I-70 / US 40 / US 61 in Wentzville
Major intersections	Route 364 in Lake St. Louis I-270 in Town and Country US 61 / US 67 in Frontenac I-170 in Richmond Heights I-55 / I-44 in St. Louis
East end	I-55 / I-64 / US 40 in St. Louis
Location
Country	United States
State	Missouri
Counties	St. Charles, St. Louis, City of St. Louis
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Missouri State Highway System Interstate US State Supplemental
← US 63 → Route 64

Interstate 64 (I-64) passes through the Greater St. Louis area in the US state of Missouri. The entire route is concurrent with U.S. Route 40 (US 40). Because the road was a main thoroughfare in the St. Louis area before the development of the Interstate Highway System, it is not uncommon for locals to refer to the stretch of highway as "Highway 40" rather than "I-64". On December 6, 2009, the portion of the highway running through the city of St. Louis was named the Jack Buck Memorial Highway in honor of the late sportscaster.^[2]

Route description

I-64 begins at an interchange with I-70, US 40, and US 61 in St. Charles County and heads south. Previously, the freeway was a divided highway signed only as US 40 with at-grade intersections, which were slowly converted to limited-access exits. The final intersection at Callahan Road was removed on October 14, 2009.^[3] The next major exit is for Route N and the western terminus of Route 364. Route 364 was completed and opened on November 2, 2014.^[4] From here, I-64 continues past interchanges with Route DD/Winghaven Boulevard, Route 94, and Research Park Circle and then crosses the Missouri River via the Daniel Boone Bridge and enters St. Louis County.

The freeway travels through the congested Chesterfield Valley, where it gains a fourth lane and then meets I-270 at a flyover interchange built in the early 1990s in the city of Town and Country. Continuing east, I-64 remains four lanes and travels through the affluent areas of Frontenac and Ladue. The next major interchange is I-170 in the city of Richmond Heights. This stretch, located between Ballas Road and I-170, was closed in 2008 for a complete reconstruction, at which point substandard exits were upgraded and the fourth lane was added. The interchange with I-170 was also overhauled, creating a full interchange with highspeed ramps in all directions. The reconstructed expressway opened to traffic on the morning of December 15, 2008.

East of the interchange with I-170, I-64 drops a lane and stays at three throughlanes to Clayton Road. Through here, the expressway passes through older neighborhoods and enters into the city of St. Louis. After readding a fourth lane, the freeway skirts the southern edge of Forest Park. In this area, one finds both the Saint Louis Science Center and Saint Louis Zoo. Kingshighway marks the end of the completely reconstructed eastern half, where again outdated exits were updated and shoulders widened. The eastern half was closed from December 15, 2008, to December 7, 2009.^[5] I-64's speed limit drops from 60 to 55 mph (97 to 89 km/h) east of Kingshighway and drops a lane at Vandeventer Avenue (the opposite of the westbound lanes). Passing by Saint Louis University, the freeway becomes double-decked for the first time (eastbound lanes at a lower level; westbound lanes at an upper one), gaining back a fourth lane east of Compton Avenue. Another lane drop occurs at the Chestnut and 20th Street exit, where the canceled Route 755 was to interchange. The freeway passes just south of the Enterprise Center and again becomes double-decked in the same arrangement, passing within 50 feet (15 m) of the New Busch Stadium. The route becomes two lanes as it approaches the Mississippi River and the Poplar Street Bridge, where it is intersects I-55 and I-44 at an incomplete interchange; it was also at this interchange that I-70 joined I-55 and I-64 to cross the Poplar Street Bridge, but its former downtown route is now an extension of I-44. Eastbound I-64 cannot directly access either one of the other routes, but westbound I-64, however, can directly access both. I-64 continues into Illinois concurrent with I-55; until 2014, it also ran concurrent with I-70, which has since been rerouted onto the Stan Musial Veterans Memorial Bridge further upstream.

History

In 2008, I-64/US 40 was closed in this area for a complete reconstruction between 2008 and 2009. Shown is the Spoede Road overpass above I-64. This overpass was demolished in June 2008.

Exit list

County	Location	mi[1]	km	Exit	Destinations	Notes
St. Charles	Wentzville	0.000– 0.305	0.000– 0.491	1	US 61 north / Avenue of the Saints – Hannibal I-70 / US 40 west – Kansas City, St. Louis	National western terminus; signed as exits 1A (I-70/US 40 west) and 1B (I-70 east); exit 210 on I-70; western end of concurrency with US 40/US 61/AOTS; cloverleaf interchange
	Lake St. Louis	1.433	2.306	1C	Prospect Road
		3.038	4.889	2	Lake Saint Louis Boulevard
		3.926	6.318	4A	Route N	Exits 1A-B on SR 364; cloverleaf interchange
		4.326	6.962	4B	Route 364 east
	O'Fallon	6.275	10.099	6	Route DD (Winghaven Boulevard)
		9.995	16.085	9	Route K – O'Fallon
	Weldon Spring	10.726	17.262	10	Route 94 – St. Charles	Eastbound exit is via exit 9
		11.928	19.196	11	Research Park Circle	No westbound entrance
Missouri River		13.186	21.221	Daniel Boone Bridge
St. Louis	Chesterfield	13.757– 14.043	22.140– 22.600	14	Chesterfield Airport Road	Eastbound exit and westbound entrance
		14.651	23.578		Spirit of Saint Louis Boulevard	Westbound exit and eastbound entrance
		14.917– 16.204	24.007– 26.078	16	Long Road / Chesterfield Airport Road	Westbound exit and eastbound entrance
		17.150	27.600	17	Boone's Crossing
		19.221	30.933	19A	Chesterfield Parkway West
		19.848	31.942	19B	Route 340 (Olive Boulevard / Clarkson Road)
		20.50	32.99	20	Chesterfield Parkway East	Westbound exit and eastbound entrance
		20.316	32.695	21	Timberlake Manor Parkway
	Town and Country	22.553	36.296	22	Route 141 (Woods Mill Road)
		23.231	37.387	23	Maryville Centre Drive	No eastbound exit
		24.186	38.924	24	Mason Road
		25.886	41.659	25	I-270 north – Chicago I-270 south – Memphis	Exit 12 on I-270 north, exits 12A-B on I-270 south
		26.207	42.176	26	Route JJ (Ballas Road)	Access to Mercy Hospital, Missouri Baptist Medical Center, and Covenant Seminary
	Frontenac	27.745	44.651	27	Spoede Road
		28.267	45.491	28A	US 61 south / US 67 / Lewis and Clark Trail west / Historic US 66 (Lindbergh Boulevard) Avenue of the Saints ends	Eastern end of concurrency with US 61; western end of concurrency with LCT; national southern terminus of the Avenue of the Saints
	Ladue	28.862	46.449	28B	Clayton Road	Westbound exit and eastbound entrance
		30.735	49.463	30	McKnight Road
	Richmond Heights	31.770– 32.249	51.129– 51.900	31B-A	I-170 north / Brentwood Boulevard / Hanley Road	Signed separately as exits 31B (Hanley/Brentwood) and 31A (I-170) westbound; exits 1A-B-C on I-170; southern terminus of I-170; access to St. Louis Lambert International Airport
				32	Laclede Station Road	Former westbound exit and eastbound entrance; removed 2007[9]
		33.071	53.223	33A	Big Bend Boulevard
		33.462	53.852	33B	Bellevue Avenue	Eastbound exit; westbound entrance via collector road connected to exit 33A
City of St. Louis		33.807	54.407	33C	McCausland Avenue
		34.042	54.785	34A	Clayton Road / Skinker Boulevard	Westbound exit and eastbound entrance
		34.949	56.245	34B	Hampton Avenue / Oakland Avenue	Oakland Ave. not signed westbound; access to Forest Park and the Saint Louis Zoo
		36.111	58.115	36A	Kingshighway Boulevard	Access to Barnes-Jewish Hospital, St. Louis Children's Hospital, Forest Park, the Missouri Botanical Garden, Ranken Technical College, the St. Louis Science Center, and St. Louis Community College
		36.722– 36.800	59.098– 59.224	36B	Tower Grove Avenue / Boyle Avenue	Tower Grove Ave. not signed westbound
		37.361	60.127	36C	Vandeventer Avenue	Eastbound exit and westbound entrance; access to the Missouri Botanical Garden
		37.750	60.753	37A	Market Street / Bernard Street	Eastbound exit and westbound entrance
		37.825	60.873	37B	Grand Boulevard	Eastbound exit and westbound entrance; access to Saint Louis University Hospital
		38.000– 38.262	61.155– 61.577	38A	Forest Park Avenue / Grand Boulevard	Westbound exit and eastbound entrance; access to Forest Park, Chaifetz Arena and Washington University
				38B	Market Street (3000 West)	Westbound exit and eastbound entrance; exit removed in 2020 due to the construction of CityPark
		38.793	62.431	38A	Jefferson Avenue	Westbound access via exit 38B
				38B	Chestnut Street at 20th Street	Eastbound exit and westbound entrance; former Missouri State Route 755; exit removed in 2020 due to the construction of CityPark
		39.124	62.964	38B	22nd Street	Access to CityPark and St. Louis Union Station
				39	Market Street at 21st Street	Westbound exit and eastbound entrance; former Missouri State Route 755; exit removed in 2020 due to the construction of CityPark
		39.646	63.804	39A	14th Street	Eastbound exit and westbound entrance; access to the Enterprise Center and the Stifel Theatre; entrance ramp includes direct ramp from Clark Avenue
		39.806	64.062	39B	11th Street – Stadium	Eastbound exit only
					10th Street / Clark Avenue	Westbound entrance only
		40.011	64.391	40	6th Street	No westbound exit; last Missouri exit eastbound
		40.140	64.599	40A	9th Street / Tucker Boulevard – Stadium	Westbound exit only
		40.369	64.968	40C	I-44 west / I-55 south – Tulsa, Memphis	Closed; consolidated with exit 40B; was westbound exit and eastbound entrance
		40.407	65.029	40B	I-44 east to I-70 west / Walnut Street – Kansas City I-44 west / I-55 south – Tulsa, Memphis	Western end of concurrency with I-55; westbound exit and eastbound entrance; access to St. Louis Lambert International Airport; former I-70 west
Mississippi River		40.817	65.689	Poplar Street Bridge
					I-55 north / I-64 east / US 40 east / Lewis and Clark Trail east to I-70 east – Illinois	Continuation into Illinois; former I-70 east
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Closed/former       Concurrency terminus       Incomplete access

See also

•  U.S. Roads portal

References

External links

Wikimedia Commons has media related to Interstate 64 in Missouri.

• Missouri Department of Transportation: The New I-64