From last week, Dave asked about ramp metering. Jeanne wanted to share the following information: Thanks for your question about ramp metering. As you know, we don't have any ramps meters in the region. The concept definitely has proven beneficial in many other cities. We have been looking at where it would be most effective to use ramp meters, and where we could get the biggest bang for the buck. Like anything else, funding for such a project has to compete with other needs. We must also assess the level of acceptance by the cities and counties impacted. Thanks for being a fan of ramp meters. Jeanne Olubogun, MoDOT Traffic Engineer
A couple of other questions from last week's chatroom: Tom asked about the ramp from 7th Street to westbound I-44. That should be reopening when the work on westbound I-44/southbound I-55 is finished in July. Also, another chatter asked about a flyover ramp from westbound Route 364 to southbound I-270. We do have several improvements in our long-range plans for the Route 364/I-270 interchange, including that movement. At this time, however, there has been no funding identified for design or construction. Andrew Gates, MoDOT Communications
Last week, A Road Crew reader asked about our plans to resurface Airport Road. (St. Louis County maintains Airport from James S. McDonnell Boulevard to North Florissant.) We will be removing and replacing this section of Airport Road's pavement either next year or in 2019. David G.Wrone, St. Louis County's Department of Transportation
You are correct, using state right of way for advertising isn't allowed. I have passed this along to our maintenance team to remove the fliers. It may take them a bit, as remedying other roadway issues may have a higher priority. As far as using that space as a source of revenue, signs large enough for drivers to read would have an impact on the safety of the intersection. It would be somewhat cost prohibitive to try to sell advertising on the signal structures and monitor that advertising, considering the number of intersections in the region. Andrew Gates, MoDOT Communications
Jefferson timing, between Market and I-44, has been examined before in the PM peak period and found to operate in a satisfactory condition given the two highways and a state route crossing it. We will verify that there has not been a malfunction of equipment however. Thanks!
Hampton, during the off-peak times, operates on a 120 second cycle. It didn't change during the Kingshighway viaduct project. This cycle length was found to be the appropriate balance between providing sufficient progression of north-south platoons on Hampton while attempting to minimize side street delays.
Our signal crews will check this out - thanks!
We had a controller malfunction and continue to run a special event timing plan intended for last night into this morning. It was detected this morning and corrected. You should see normal operation tomorrow morning. Sorry for the inconvenience.
The changes to Gravois were made after discussions with the residents along the roadway. The road diet and safety improvements were made in response to residents concerns to have a safer roadway where they live and shop. Andrew Gates, MoDOT Communications
"M" - the motorist who commented earlier about the bike lanes on Gravois - could you please email me at email@example.com? Thanks. David G. Wrone, St. Louis County Department of Transportation
I have passed the timing and the signing questions along to our traffic team to check out and evaluate. Andrew Gates, MoDOT Communications
You are welcome. Andrew Gates, MoDOT Communications
I'll have some information on this by next week's chat. (I've forwarded your concerns, questions and recommendations to our Division of Operations and Division of Construction for feedback.) David Wrone, St. Louis County
Traffic signal controllers are programmed with vehicle clearance intervals (yellow and all red times). The yellow that you mentioned is a specific time that the indication is displayed that provides adequate time to decelerate to a stop given the driver's perception/reaction time, vehicle's speed, grade of roadway, and vehicle deceleration rate. Displaying a countdown timer for vehicles would likely lead to more sudden increases in speed to clear the intersection than what might have occurred otherwise when yellow is displayed.
We will investigate this intersection to see if any conditions are still present to warrant continued use of this turn restriction.
I don't believe we have any plans to incorporate these signals along Grant's Trail on state roadways. I will pass your suggestion along to our team to consider. Andrew Gates, MoDOT Communications
Those are utility access points. We are working with the utility companies to get them adjusted. Andrew Gates, MoDOT Communications
On the weekends, Hampton (between I-64 and I-44) is programmed to run a northbound-oriented timing plan 5:30 AM - 6:30 PM due to the traffic patterns between these two highways relative to Forest Park and the Zoo as major attractions. South of I-44 (where the influence of the park is less pronounced to traffic), the signals run typical morning (predominately northbound), off-peak (bi-directional), and afternoon (predominately southbound) plans.
It isn't safe to make that left turn without rebuilding the intersection. Making that left turn from the ramp onto Gravois would be a fairly sharp turn. Andrew Gates, MoDOT Communications
We'll take a look at it and make sure that it is correct. Andrew Gates, MoDOT Communications