Missouri Route 370

Missouri Route 370 (Route 370) is a freeway that connects St. Louis County with St. Charles County via the Discovery Bridge over the Missouri River.

Route 370
Route information
Maintained by MoDOT
Length	12.957 mi[1] (20.852 km)
Existed	1993–present
Major junctions
West end	I-70 in St. Peters
	Route 94 in St. Charles Route 141 in Bridgeton
East end	I-270 in Bridgeton
Location
Counties	St. Charles, St. Louis
Highway system
Missouri State Highway System Interstate US State Supplemental ← Route 367 Route 371 →

Route description

From west to east, Route 370 begins in St. Peters at Interstate 70 (I-70) east of Mid Rivers Mall Drive and ends in Bridgeton at I-270 west of Missouri Bottom Road.[2]

History

Construction on Route 370 began in the early 1990s. It was built to replace the section of St. Charles Rock Road, then designated as Route 115, west of I-270.

MoDOT applied for an interstate highway designation of Interstate 370, but AASHTO rejected this in favor of the designation of Interstate 870. MoDOT did not want this because I-870 was their intended designation for what is now Interstate 255.[3]

On December 16, 1992, the first section of the highway opened allowing direct access to St. Charles at Route 94 from I-270. It replaced the crumbling Old St. Charles Bridge that carried Route 115 traffic. On April 1, 1993, the road was designated as Route 370. In 1993, the Great Flood of 1993 surrounded much of the highway which is built on top of an embankment. As the flood waters surrounded the highway, many of the new exits had been shut down because the roads it connected to were underwater. Despite the flood, construction resumed on the highway until it was completed in 1996.

Exit list

County	Location	mi[1]	km	Exit	Destinations	Notes
St. Charles	St. Peters	0.000– 0.615	0.000– 0.990	1	I-70 – St. Louis, Kansas City	Western terminus; signed as exits 1A (east) and 1B (west)
		1.277– 1.573	2.055– 2.531	1C	Salt River Road	Westbound exit and eastbound entrance
		2.687	4.324	2	Truman Boulevard / Lakeside Park Drive
	St. Charles	5.110	8.224	5	Elm Street / New Town Boulevard
		7.882	12.685	7	Route 94 / Lewis and Clark Trail (North 3rd Street)
Missouri River		8.454	13.605	Discovery Bridge
St. Louis	Bridgeton	9.363	15.068	9	Route 141 south (Earth City Expressway)	Northern terminus of Route 141
		11.632	18.720	11	St. Louis Mills Boulevard
		12.343	19.864	12A	I-270 north – Chicago, IL	Eastbound exit and westbound entrance
		12.596	20.271	12B	Missouri Bottom Road	Eastbound exit and westbound entrance
		12.957	20.852	12C	I-270 south – Memphis, TN	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Incomplete access

See also

•  U.S. Roads portal

References

1. Missouri Department of Transportation (December 26, 2013). MoDOT HPMAPS (Map). Missouri Department of Transportation. Retrieved December 26, 2013.
2. Google (December 22, 2012). "Missouri Route 370" (Map). Google Maps. Google. Retrieved December 22, 2012.
3. "They built it, and they came: Highway 370, Discovery Bridge have served many purposes". Suburban Journals of Greater St. Louis (MO). December 12, 2006.

Template:Attached KML/Missouri Route 370

KML is from Wikidata