Virtual Public Meeting

Major Interchanges

Top image - I-270 North and Lindbergh Interchange, removing loop ramps and building a new interchange with traffic signals at the on- and off-ramps.

Bottom image - I-270 North at Route 367 Interchange, replacing three loop ramps with new geometrics to enhance traffic flow and safety. The new ramp from eastbound I-270 to northbound Route 367 will have two lanes.

Current Challenges

This project is working to address several concerns along the corridor: traffic congestion, aging infrastructure, lack of facilities for non-motorized users, and outdated cross-over slip ramps.

Project Overview

This is an overview of the I-270 North Project improvements.

Strip Map 1 of 10

Western limit of the I-270 North Project at James S. McDonnell Boulevard where Dunn Road will be resurfaced. The blue arrows show the direction of traffic flow.

Strip Map 2 of 10

The Lindbergh Interchange will be reconfigured to improve traffic flow and provide access to Dunn Road. Dunn Road will be continuous through the Lindbergh Interchange. A lane will be added to I-270 in both directions, from west of Lindbergh to Route 367. The blue arrows show the direction of traffic flow.

Strip Map 3 of 10

The slip ramp from Dunn Road to westbound I-270 will be improved with a roundabout; giving access for both directions of Dunn Road. Both Dunn and Pershall Road will be converted to a one-way outer road system east of the Hanley/Graham Interchange. The blue arrows show the direction of traffic flow.

Strip Map 4 of 10

The New Florissant and Washington/Elizabeth Interchanges will be reconstructed to improve traffic flow. The New Florissant bridge will be replaced and will include pedestrian facilities under I-270. Pershall Road will be extended between New Florissant and Washington/Elizabeth to make Pershall Road a continuous outer road from Lindbergh to east of Old Halls Ferry. A new u-turn bridge at Washington/Elizabeth allows free-flow travel from Pershall to Dunn Road. A new multi-use path will be constructed along both outer roads for non-motorized travel. The blue arrows show the direction of traffic flow.

Strip Map 5 of 10

The reconstructed West Florissant Interchange includes a new u-turn bridge at West Florissant allows free-flow travel from Pershall to Dunn Road. Pershall improvements include access for Metro buses from the North County Transit Center to West Florissant and the Florissant Valley Community College. A new multi-use path will be constructed along both outer roads for non-motorized travel. The blue arrows show the direction of traffic flow.

Strip Map 6 of 10

Reconstructing the Old Halls Ferry and New Halls Ferry interchanges to improve traffic flow. The New Halls Ferry bridge will be replaced and will include pedestrian facilities under I-270. Dunn Road transitions from two-way to one-way at Linnell Drive. Pershall Road transitions from one-way to two-way at Old Halls Ferry. The blue arrows show the direction of traffic flow.

Strip Map 7 of 10

A new bridge will connect Pershall and Dunn Roads over I-270, west of Route 367. The Route 367 Interchange will be improved with dual lane directional ramps from southbound Route 367 to westbound I-270 and eastbound I-270 to northbound Route 367. The blue arrows show the direction of traffic flow.

Strip Map 8 of 10

The off- and on-ramps at Bellefontaine will be reconfigured utilizing a roundabout west of Bellefontaine. This design replaces the at-grade crossover slip-ramp east of Bellefontaine.

Strip Map 9 of 10

Westbound I-270 to northbound Lindbergh and southbound Lindbergh to westbound I-270 traffic will no longer need to go through the Taylor/Lynn Haven intersection. The blue arrows show the direction of traffic flow.

Strip Map 10 of 10

This image is along I-170 immediately south of I-270. The I-270 North Project includes an additional lane on southbound I-170 from I-270 to Frost Avenue.

Non-Motorized Improvements

This image highlights the bicycle and pedestrian improvements along the I-270 North corridor.

2020 Detours 1 of 6

The detour for I-270 eastbound on-ramp from New Florissant Road is shown in green. The detour for I-270 eastbound off-ramp to North Elizabeth Avenue is shown in yellow. Estimated detour date starting: April 2020.

2020 Detours 2 of 6

The detour for I-270 eastbound on-ramp from New Florissant Road is shown in green. The detour for I-270 eastbound off-ramp to North Elizabeth Avenue is shown in yellow. The detour for southbound Washington crossing I-270 is shown in blue. The detour for North Elizabeth Avenue is shown in pink. Estimated detour date starting: August 2020.

2020 Detours 3 of 6

The detour for I-270 eastbound on-ramp from New Florissant Road is shown in green. The detour for I-270 eastbound off-ramp to North Elizabeth Avenue is shown in yellow. The detour for southbound Washington crossing I-270 is shown in blue. The detour for North Elizabeth Avenue is shown in pink. Estimated detour date starting: November 2020.

2020 Detours 4 of 6

The detour for I-270 eastbound on-ramp from New Florissant Road is shown in green. The detour for I-270 eastbound off-ramp to North Elizabeth Avenue is shown in yellow. The detour for southbound Washington crossing I-270 is shown in blue. The detour for North Elizabeth Avenue is shown in pink. Estimated detour date starting: November 2020.

2020 Detours 5 of 6

The detour for I-270 eastbound on-ramp from Old Halls Ferry Road is shown in green. The detour for southbound Old Halls Ferry Road crossing I-270 is shown in blue. The detour for northbound Old Falls Ferry is shown in pink. Estimated detour date starting: September 2020.

2020 Detours 6 of 6

The detour for northbound Lindbergh to westbound I-270 is shown in pink. Estimated detour date starting: July 2020.

Construction Schedule

These are additional construction impacts for the I-270 North Project. Additional required detour maps will be developed closer to closure dates.