Alternate Route: Major Ramp Closure this Weekend (Updated)

With two major closures coming up in August, it’s time to start practicing those alternate routes. The first closure will be this weekend, when the ramp from Westbound 40 to Northbound I-170 will be closed from August 3rd at 7pm until August 6th at 5:30am.

Gateway Constructors, the contractor for the Highway 40 rebuilding project, has recommended a detour route exiting Highway 40 to north on Big Bend to west on Forest Park Parkway to I-170. That route is shown in blue in the map below:

[Zoom and pan the map as needed; Click on markers for more information; Full map]

I’ve highlighted two other alternate routes that you might consider:

  • Red route — If the official detour exit at Big Bend looks too crowded, exit Highway 40 at Hanley Road. Go north on Hanley Road, then turn left onto Forest Park Parkway, then join I-170
  • Green route — Exit Highway 40 at Brentwood. Go north on Brentwood, turn right on Galleria Parkway, then left onto Northbound I-170.

It’s good to see the official detour route recommend Forest Park Parkway, since the Parkway is the closest divided roadway in the area. However, I think the green route is the most obvious and potentially the quickest. The green route passes through 5 stoplights, one fewer than the official route, and spends less time off the highway. In the end, the best of these routes will probably be the one less traveled.

Upcoming, I’ll take a look at alternate routes for the complete Highway 40 shutdown planned in a couple weeks. What routes will you use this weekend? Leave a comment and share with others.

Update 8/3:

The Post-Dispatch ran a story on just this topic today, mentioning all three of the above options.


  1. Recent Posts

    1. Highway 40 Re-opening: Final Predictions
    2. Totally Tubular on I-170
    3. Summary of Highway 40 Shutdown Trouble Spots
    4. What’s Wrong With Post4TrafficOnline.com?
    5. Prediction: Highway 40 Shutdown Not So Bad — At First
    6. Yes, Virginia, There is an Official Detour
    7. Little Delays Adding Up
    8. Long Light
    9. My Preschooler Can Draw Better Lines
    10. January Weekend Woes

  2. Search Website