Joel Fitts, Senior Traffic Engineer
Post Number: 64
|Posted on Monday, November 16, 2009 - 06:03 pm: |
As was the case for Tuesday’s accident, the majority of crashes at that intersection have been the result of westbound vehicles running the red light (not southbound vehicles). Although the design and visibility of the intersection is identical to other intersections along the Tollway which do not have this issue, we installed an additional signal head lower on the pole facing westbound traffic and that seemed to eliminate the issue for about 5 months.
After Tuesday’s crash, we implemented a different signal timing sequence that reduces the possibility of westbound traffic running the red light. This timing sequence is less efficient for northbound and southbound traffic, but we will explain the safety benefits to those that complain about waiting longer at the light. We will also install a sign north of the intersection warning southbound traffic about the traffic signal ahead.
We will continue to monitor the intersection to ensure that the signal timing change has improved the situation, and will make further adjustments if necessary.
As people drive around the Metroplex, it is important to note that not all frontage road intersections operate with the exact same timing method (along the Dallas North Tollway or SH 121, for example). Therefore, motorists should always pay attention to the second set of traffic signals and not assume what they will do.
Senior Traffic Engineer