Typically, the lanes through a tunnel are narrower, the light levels change significantly, and there are much closer quarters in a tunnel; changing lanes within a tunnel is discouraged for these reasons. You really don't have those issues while on the I-70 bridge across the Missouri River. In addition, there are entrances and exits on both sides of the Missouri River bridge which would make minimizing lane changes of limited value. Finally, any type of prohibition such as this would require significant enforcement by law enforcement. Andrew Gates, MoDOT Communications
As we determine the need to maintain bridges, we look at whether it may be more efficient to replace the bridge or rehabilitate it. For instance, along the I-55 corridor we have several bridges that are getting a new deck , and some others that are simply getting an overlay. Materials and designs have definitely improved over time. Voided slabs (which consisted of reinforced concrete with voids (which helped reduce the concrete needed) were popular in the 1950s (somewhat like the Grand bridge over I-44). Andrew Gates, MoDOT Communications
Some of that is due to people getting used to the new traffic patterns, which will definitely get reduced over time as people learn the traffic pattern. We'll continue to monitor to see if it is anything more than people getting familiar with the new traffic flow. Andrew Gates, MoDOT Communications
Thanks for your suggestion. I don't see it happening here, but it is definitely an interesting idea. Andrew Gates. MoDOT Communications
We do have a team that monitors and adjusts signal timing along the corridor. If you have specific times, directions and roadways that seem to be significantly backed up, you can share them with our customer service team (24/7 at 314-275-1500) and we can have the team look at them. Andrew Gates, MoDOT Communciations
That is a permit project, and from what we are told, the team doing the work had to do some design work to complete the project. When that design is complete, they can obtain and install any additional equipment and finish the project. We haven't been given an updated completion date at this time. Andrew Gates, MoDOT Communications
You are correct in that it is typical for lane shifts to have reduced speeds. I am checking with our construction team to see what may be the case here. I'll share what I get from them, either today, or in a future chat. Andrew Gates, MoDOT Communications