St. Louis County Department of Transportation Announces Cost Sharing Agreement for North County


St. Louis County, MO (November 2, 2020) – St. Louis County is committing significant financial resources to assist Missouri’s Department of Transportation as the state continues its $278 million rebuild of I-270 in North County.

Under a cost-sharing agreement with the state’s Department of Transportation (MoDOT), the County will invest more than $6 million to resurface roads, build sidewalks and add turn lanes at high-volume roads that provide direct access to the interstate. These projects – and other work – will improve traffic flow during the I-270 rebuild and optimize the many benefits of the new and improved I-270 corridor once the rebuild is complete.

“This is a historic construction project that will benefit North County and the entire region for many years to come,” said St. Louis County Executive Dr. Sam Page. “More than 140,000 vehicles use I-270 each day, and St. Louis County is proud to play a role in making these critical improvements a reality.”

MoDOT began its rebuild of I-270 this past spring. The interstate construction project will span from James S. McDonnell Boulevard/Howdershell Road east to Bellefontaine Road, with work expected to conclude by late 2023.

Aspects of the project to be financed by St. Louis County include:

  • Lengthening two I-270 bridges – under which St. Louis County-maintained New Florissant and New Halls Ferry roads run, respectively – to provide the space needed to construct dual turning lanes from those county roads onto I-270.
  • Construction of sidewalk on the south shoulder of Pershall Road between Old Halls Ferry and a new bridge west of Route 367.
  • Installation of enhanced pedestrian crossings at eight Metro bus stop locations. These crossings will feature rectangular, rapid flashing beacons and block style crosswalks.
  • Installation of decorative street names – one facing eastbound traffic and one facing westbound traffic – on each I-270-spanning bridge at Lindbergh, New Florissant, Washington/Elizabeth, West Florissant, New Halls Ferry, Old Halls Ferry, and the new bridge being built west of Route 367.
  • Working with MoDOT’s Mitigation of Traffic Committee to identify and implement needed signal timing changes to County-maintained roads during the life of the project.

For more information on this project, please visit: