Post Number: 1
|Posted on Monday, November 12, 2012 - 03:22 pm: |
Is there any plan in the short term to widen Main Street from the Dallas North Tollway to at least Teel from 2 to 3 lanes in each direction? Looking at the Frisco GIS maps, that section is one of the more heavily used roads in Frisco. Ever since the light went in at Kyser way, the back-ups in rush hour are even worse.
Jason Brodigan, Sr. Civil Engineer
Post Number: 125
|Posted on Monday, November 19, 2012 - 03:33 pm: |
We do not have any short term plans to widen Main Street to 6 lanes between FM 423 and the DNT. The project is in our 5 year plan Capital Improvment Plan, and we are hoping to begin design of the project in late 2013 or early 2014; however, we do not have a scheduled date for constrution to begin at this time.
Post Number: 2
|Posted on Thursday, December 27, 2012 - 08:56 pm: |
Why doesn't the city at least make the right lane at the SW corner of DNT and Main available for right turns throughout the day instead of just during the morning rush hour? Backed up traffic as in the image below is FAR too common.
Joel Fitts, Senior Traffic Engineer
Post Number: 138
|Posted on Thursday, January 10, 2013 - 10:59 am: |
The changeable lane assignment sign was installed to dynamically serve the different traffic patterns that occur at that intersection. Initially, two dedicated right-turn lanes were permanently marked, which served the morning rush hour traffic well. However, the sole remaining through lane was not enough to serve eastbound traffic at other times of the day (while the second right-turn lane remained empty). Consideration was given to a lane that always allowed through and right-turn traffic as you suggest; however, just a few through vehicles in that lane in the morning could block the entry point to the right-most right-turn lane, which would cripple its ability to allow traffic to turn right-on-red.
Therefore, the changeable lane assingment sign was installed so that the operation of the lane could change based on the different demand for right-turning traffic and through traffic at different times of the day. At the time, we could not locate an electronic sign that displayed the right only, through only, and through-and-right images. And so we were limited to providing either right only or through only.
Since the electronic sign's installation, we have periodically checked the traffic movements on the eastbound approach to this intersection over the course of the day and still found the need to switch from two right-turn lanes to two through lanes. However, from time to time we have tweaked the amount of time that the two right-turn lanes are provided in the morning.
We will continue to periodically check the traffic demand for these different movements to determine if the operation of the changeable sign needs to be adjusted. In the long term, when this equipment needs to be replaced, we will install a new unit that gives us the ability to provide the shared-use lane mode. We cannot justify replacing this equipment at this time because our limited funding is currently prioritized for other roadway improvements needed at other locations (for traffic signal installations or roadway widening).
The picture you included shows traffic waiting at a red light. It is important to note that allowing through and right-turn traffic to use that lane would not guarantee that the right-turn traffic would experience less delay at the red light: One through vehicle in that lane would block any other vehicles from turning right-turn on red in that lane and would result in the same amount of right-turning vehicles waiting at the red light.
Senior Traffic Engineer
Post Number: 15
|Posted on Wednesday, August 07, 2013 - 04:25 pm: |
When school starts again, Main St. will be backed up because of the new light at Cotton Gin and the Tollway. Also in the evening because of this new light, traffic will backed up onto the Tollway heading south. Was there really a need for a light for the few cars that use Cotton Gin?
Joel Fitts, Senior Traffic Engineer
Post Number: 150
|Posted on Thursday, January 16, 2014 - 08:46 am: |
Sorry your post was missed originally. I will now explain the need for the traffic signal:
There are only a few locations where vehicles can cross from one side of the Tollway to the other, which therefore concentrates traffic at these locations. As you have seen down in Plano and in Dallas, every one of these locations eventually gets a traffic signal because the volume of traffic on the frontage roads is so high that there is no other way for traffic on the cross street to safely cross under (or over) the Tollway. As such, the Cotton Gin location has always been planned to have a traffic signal eventually.
We waited to install the traffic signal at Dallas Parkway and Cotton Gin until it met the necessary criteria. Traffic volumes have slowly been increasing on Cotton Gin and we know that the traffic will jump up as soon as additional development occurs in Frisco Square and as soon as the large tracts of open land on the west of the Tollway develop (one tract is about to start construction). However, we could not wait for the traffic volumes to rise any more because the number of crashes at the intersection was beginning to spike, showing that the signal was necessary to provide a safe crossing.
With the traffic signal in place, we have instituted a timing plan that gives the vast majority of green time to the frontage roads in order to minimize the delay caused by the new traffic signal. In addition, once the construction of Stonebrook Parkway is completed between Legacy Drive and the Tollway in early 2015, we believe some of the traffic using the frontage roads to travel to and from Main Street will shift to Stonebrook Parkway, which should help balance out traffic volumes along the frontage roads.
Senior Traffic Engineer