Interstate 64 in Missouri

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Interstate 64
I-64 highlighted in red
Route information
Maintained by MoDOT
Length	40.817 mi[1] (65.689 km)
Existed	1987–present
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
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 U.S. state of Missouri. The entire route overlaps 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 Interstate 70, U.S. Routes 40 and 61 in St. Charles County and heads south. Previously, the freeway was a divided highway signed only as U.S. 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 Missouri Route 364. Route 364 was completed and opened on November 2, 2014.^[4] From here, I-64 continues past interchanges with Winghaven Boulevard / Route DD, 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 Interstate 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 Interstate 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 high speed 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 through lanes to Clayton Road. Through here, the expressway passes through older neighborhoods and enters into the city of St. Louis. After re-adding a fourth lane, the freeway skirts the southern edge of Forest Park. In this area, one finds both the St. Louis Science Center and St. 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 miles per hour east of Kingshighway and drops a lane at Vandeventer Avenue (the opposite of the westbound lanes). Passing by St. Louis University, the freeway becomes double-decked for the first time (eastbound lanes at a lower level, westbound lanes 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 cancelled Missouri 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 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 Interstates 55 and 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.

Initial construction[]

Before the interstate highway system, US 40 was a main thoroughfare through St. Louis and Kansas City. From each state line, there were signs saying "Future I-55/I-64 Corridor" and "Future I-70 Corridor".

Reconstruction[]

The Missouri Department of Transportation rebuilt the stretch of I-64 from Spoede Road to Kingshighway Boulevard between 2008 and 2009. The project included new concrete pavement on the highway; approximately 25 rebuilt bridges; and several reconfigured interchanges, including a new freeway-to-freeway interchange at Interstate 170.

The section between Spoede Road and I-170 was closed for reconstruction on January 2, 2008 and opened to traffic on December 15, 2008. The section between I-170 and Kingshighway Boulevard was closed on December 15, 2008 and reopened to traffic on December 7, 2009.^[6] The project was completed with a dedication and opening day ceremony on Sunday, December 6.^[2] In 2020, exits 39 and 38B were closed and demolished to make way for the St. Louis MLS Stadium on the site.^[7] The ramps were the remnants of a 3.3-mile-long North-South Distributor Highway that was never built.^[8]

Exit list[]

County	Location	mi[1]	km	Exit	Destinations	Notes
St. Charles	Wentzville	0.000– 0.305	0.000– 0.491	–	US 61 north (Avenue of the Saints) – Hannibal	Western terminus of concurrency with US-61/AOTS, national western end of I-64
				1	I-70 / US 40 west – Kansas City, St. Louis	Signed as exits 1A (west) and 1B (east); exit 210 on I-70; western terminus of concurrency with US 40; 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 (Hawk Ridge Trail)
		4.326	6.962	4B	Route 364 – Dardenne Prairie	Exits 1A-B on SR 364; cloverleaf interchange
	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 – Chicago, Memphis	Exit 12 on I-270
		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 (Lindbergh Boulevard)	Eastern terminus of concurrency with US-61; 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	51.129	31A	I-170 north – Clayton	Exit 1 on I-170; southern terminus of I-170; access to Lambert–St. Louis Airport
		32.249	51.900	31B	Brentwood Boulevard / Hanley Road	Roads connected via one way collector road
				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	Eastbound slip ramp exit to Oakland Avenue eastbound; 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	Boyle Avenue / Tower Grove Avenue	Boyle Avenue only 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 and Washington University
				38B	Chestnut Street at 20th Street / Market Street at 21st Street	Chestnut Street and 20th Street signed eastbound only; Market Street and 21st Street signed westbound only; portion of never-completed Missouri State Route 755; removed 2020 for construction of St. Louis City stadium
		38.793	62.431	38C	Jefferson Avenue	Eastbound exit and westbound entrance
		39.646	63.804	39B	14th Street	Eastbound exit and westbound entrance; access to the Enterprise Center and the Stifel Theatre
		39.806	64.062	39C	11th Street	Eastbound exit and westbound entrance; access to Busch Stadium
		40.011	64.391	40B	6th Street	Eastbound exit and westbound entrance
		40.140	64.599	40A	9th Street / Tucker Boulevard	Westbound exit only; eastbound entrance via 6th Street; access to Busch Stadium
		40.369	64.968	40C	I-55 south / I-44 west – Memphis, Tulsa	Western terminus of concurrency with I-55; westbound exit and eastbound entrance
		40.407	65.029	40	I-44 east to I-70 west / Walnut Street – Kansas City	Westbound exit and eastbound entrance; Access to St. Louis Lambert International Airport
Mississippi River		40.817	65.689	Poplar Street Bridge
				–	I-55 north / I-64 east / US 40 east to I-70 east – Illinois	Continuation into Illinois
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

See also[]

•  U.S. Roads portal

References[]

External links[]

Route map:

• Missouri Department of Transportation: The New I-64

Interstate 64
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