Both the U.S. interstate and the Missouri highway systems that serve the North St. Louis county area allow for much more convenient , rapid access than is normally found in metro areas similar in size. Although there are business and retail hubs throughout North County, you will not experience the traffic gridlock found in other metropolitan areas. Interstates 70, 170, 270 and 370, along with High-ways 67, 367 make the area extremely accessible for both people and products. Access to Interstates 44, 64 and 55 is available within 10-25 miles from the North County area. Because local leaders continually work to maintain the roads nearly $200 million has been spent in this part of St. Louis County on highway and road improvements during the past 10 years.
Interstate I-170 (I-170), also known as the Inner Belt Expressway, is an 11.17-mile highway traveling north-south through the St. Louis County municipalities of the City of Hazelwood, City of Berkeley, City of St. John, City of Charlack, City of Vinita Park, City of Sycamore Hills, City of Bel-Ridge, City of Olivette, City of Overland, City of University City, City of Ladue, City of Clayton, and the City of 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 270 (I-270) makes up a large portion of the outer belt freeway in the St. Louis, Missouri metropolitan area, with a large portion of the interstate spanning the North County area. The entire highway spans 50 miles in length from Illinois on the southern portion of St. Louis County to Illinois in North St. Louis County. The Highway is a north-south highway but at highway 70 becomes an east-west thoroughfare as it treks through North County. NCI has worked with MoDot on the 1-270 corridor study which emphasizes a need for significant infrastructure improvements to the highway in North St. Louis County.
Route 370 is a 13 mile long freeway that connects North St. Louis County with St. Charles County via the Discovery Bridge over the Missouri River, giving drivers an alternative route and alleviating traffic congestion. 370 provides commuters a glimpse at some of the 100’s of acres of natural farmland that resides within the North St. Louis County area.
Route 367 also known as Lewis and Clark Hwy is a 8.9-mile long roadway running north and south through the North County area. In December 2007, a multi-year reconstruction project converted the St. Louis County portion of Route 367 into a freeway. The new freeway helps to provide a more direct route between the City of St. Louis and the city of Alton, Illinois.
Interstate 70 spans the width of Missouri from downtown St. Louis all the way to Kansas City. It is one of the busiest traffic corridors through North County, let alone the state of Missouri, specifically between the Blanchette Bridge and I-270 in the Earth City area. I-70 intersects with I-270, I-170 and runs parallel to Lambert St. Louis International Airport with several access points to into the airport property and parking.
Route 364, known locally as the Page Avenue Extension or the Page Expressway, is a 9 mile long freeway that connects from I-270 in North St. Louis County within the City of Maryland Heights with St. Charles County via the Veterans Memorial Bridge over the Missouri River. It was the 3rd bridge constructed in the North County area that provides direct access to St. Charles County.
Route 141 begins in North St. Louis County at the 370 terminus in Bridgeton and runs 21 miles south to US-61 in Arnold at it’s southern terminus. As of August, 2012, a new six-lane realignment opened between Ladue Rd. and Page Avenue, with interchanges at Ladue, Olive, and Page. The section between Page and Olive (tentatively titled the Page-Olive Connector), which was constructed by St. Louis County has been turned over to the Missouri Department of Transportation and designated as Route 141. Maryland Heights Expy and Earth City Expy have also been designated as 141.