U.S. Federal Route 40 is the main east-west expressway through West County. Recently, Interstate 64 has been extended along this right-of-way from a old ending at Interstate 270.
The December, 19th, 2004 St. Louis Post-Dispatch, said the state highway and transportation department has approved the location for a new bridge over the Missouri River. A new four-lane bridge will built west of the current eastbound bridge, which opened in 1989. It will be many year though until the bridge is built. When completed, the new bridge will carry eastbound traffic. The current eastbound traffic will carry traffic west into St. Charles County. The original bridge at the site, which currently carries westbound traffic, was built in 1937. It will become a ramp from Chesterfield Airport Road to WB I-64/U.S. Rt. 40; NB U.S. Rt. 61. As of now, no money is avalible for the project. The state projects the it to be built near 2012 to 2020. U.S. Rt. 40 passes through the following towns in St. Louis County. Richmond Heights
Ladue
Frontenac
Town and Country Chesterfield
U.S. Rt. 40 is multi-plexed in St. Louis County. Interstate 64, throughout St. Louis County. U.S. Rt. 61, from Frontenac to the St. Louis/St. Charles County Line.
U.S. Rt. 40 crosses the following highways in St. Louis County. Interstate 170, at Richmond Heights. U.S. Rt. 61, at Frontenac.
EB I-64/U.S. Rt. 40 in Richmond Heights. WB I-64/U.S. Rt. 40 at Big Bend. WB I-64/U.S. Rt. 40 near I-170. WB I-64/U.S. Rt. 40 at I-170. A set of BGS's on SB I-170. EB I-64/U.S. Rt. 40 at Mc Cutcheon. EB I-64/U.S. Rt. 40 at the Richmond Heights City Limits. EB I-64/U.S. Rt. 40 at Mc Knight. WB I-64/U.S. Rt. 40 in Ladue. Overhead BGS's on NB I-270. WB I-64/U.S. Rt. 40; NB U.S. Rt. 61 near Ballas Road. WB I-64/U.S. Rt. 40; NB U.S. Rt. 61 in Town & Country. WB I-64/U.S. Rt. 40; NB U.S Rt 61 in Chesterfield. WB I-64/U.S. Rt. 40; NB U.S. Rt. 61 in Chesterfield. A mile marker near the Boone Bridge. WB I-64/U.S. Rt. 40; NB U.S. Rt. 61 near the Missouri River. WB I-64/U.S. Rt. 40; NB U.S. Rt. 61 has the older bridge across the Missouri River. There are no shoulders and no passing on the bridge. A closer look at the signs on the bridge. WB I-64/U.S. Rt. 40; NB U.S. Rt. 61 crossing the Missouri River.
