Interstate 170

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Interstate 170 Auxiliary route of the Interstate Highway System
Maintained by MoDOT
Length:	11.17 mi[1] (17.98 km)
South end:	I-64 / US 40 in Richmond Heights
Major junctions:	I-70 in Berkeley
North end:	I-270 in Hazelwood
Missouri Highways < US 169 Route 171 > Supplemental

Interstate 170 (abbreviated I-170) is the designation for an interstate route in the St. Louis, Missouri metropolitan area. I-170, also known as the Inner Belt Expressway, is an 11.17 mile highway traveling north-south through the St. Louis suburbs of Hazelwood, Berkeley, St. John, Charlack, Vinita Park, Sycamore Hills, Bel-Ridge, Olivette,Overland, University City, Ladue, Clayton, and Richmond Heights, ending just north of the city of Brentwood.

I-170 connects to Interstate 270 at its northern terminus and Interstate 64 at its southern terminus; at exits 7A and 7B, I-170 crosses its parent, I-70. Interstate 170 also provides access to Lambert-St. Louis International Airport.

Contents 1 History 2 Future 3 Exit list 4 References 5 External links

History

I-170 was originally intended to provide an inner beltway within I-270 through St. Louis County extending to I-55 in the South County area; however, the portion of the route south of I-64/US 40 was cancelled due to local opposition. The portion of MetroLink's Cross County Extension south of I-64 runs roughly along the proposed alignment.

The southern portion of I-170 was built using St. Louis County funds in the 1960s. It was signed as Route 725.

Future

The southern two interchanges on I-170 (at I-64/US 40 and Galleria Parkway) are being reconstructed as part of the New I-64 project. Most notably, the new interchange will include direct access to I-170 from eastbound I-64; however, access to Galleria Parkway from northbound I-170 will be eliminated.^[2]

Exit list

County	Municipality	Mile[3]	#	Destinations	Notes
St. Louis	Richmond Heights	0.00		Eager Road / Brentwood Boulevard – Brentwood Promenade Court
		0.00	1A	I-64 / US 40 east – St. Louis	Southbound only
		0.00	1B	I-64 / US 40 west – Wentzville	Southbound only
	Clayton	0.84	1D	Brentwood Boulevard south	Southbound only
		1.12	1E	Forest Park Parkway
		1.55	1F	Ladue Road
		2.22	2	Delmar Boulevard
	University City	3.39	3	Route 340 (Olive Boulevard)
	Overland	4.15	4	SSR D (Page Avenue)
	Charlack	5.65	5	Route 180 (St. Charles Rock Road)
	St. John	6.61	6	Route 115 (Natural Bridge Road)
	Berkeley	7.43	7A	I-70 east – St. Louis
		7.60	7B	I-70 west – Kansas City
		7.68	7C	Lambert-St. Louis Airport	Northbound only
		8.42	8	North Hanley Road / Scudder Road
		8.83	9A	Airport Road
		9.08	9B	Boeing Plant	Northbound only
		9.61	9C	North Hanley Road	Northbound only
	Hazelwood	10.58	10A	I-270 west – Kansas City	Northbound only
		10.58	10B	I-270 east – Chicago	Northbound only

References

External links

• Kurumi.com: Interstate 170

v • d • e Auxiliary routes of Interstate 70 Colorado: 270 • 470 (former) — Kansas: 470 • 670 — Missouri: 170 • 270 • 470 • 670 — Illinois: 270 — Ohio: 270 • 470 • 670 — West Virginia: 470 — Maryland: 170 (former) • 270 • 370