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Northbound Service Roads narrow to 1 lane where Southbound are 2 la...richard10-21-11  03:45 pm
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Jeff Pergola
New member
Username: Jeff_pergola

Post Number: 22
Registered: 07-2003
Posted on Monday, February 18, 2008 - 11:01 am:   

When traveling north on teh service road of the tollway between 121 and Main St. The service road narrows to one lane for the Lebanon and Main St.exit ramps for the DNT, but not for the Stonebrook ramp. Why is this?

I have noticed car exit the tollway at this exit at a high rate of speed (when compared to the speed of the service road), and with the short merge area for merging with existing traffic, there is cause for concern that an accident will occur. not to mention that the service road veers to the left as well just prior to the light at Stonebrook.

Why was narrowing the service road to a single lane not considered for this exit ramp? Can this be considered in the future, as there have been numerous times that people in the left service road lane had to brake rapidly to yield for cars exiting the ramp. Causing other cars traveling behind to also brake suddenly.
 

Curt Balogh, Spec. Asst. to the City Mgr
Board Administrator
Username: Admin

Post Number: 502
Registered: 02-2003
Posted on Monday, February 18, 2008 - 02:00 pm:   

Jeff, the ramps were determined based the volume exiting and the volume on the service roads as to the configuration that was placed. However, over the past several months, both NTTA and the City have been looking at customer service enhancements at all the ramps from SH121 to US 380. NTTA is suggesting the following improvements although the DNT was constructed as designed by Professional Engineering firms.

1. The Lebanon Northbound exit curb will be removed perpendicular to the service road and taper the leading edge. They will also install yellow reflector traffic buttons. This is being done as a customer service enhancement.

2. The Eldorado Northbound exit curb will be removed perpendicular to the service road and taper the leading edge. This is being done as a customer service enhancement.

3. The Stonebrook Northbound exit curb will be removed perpendicular to the service road and taper the leading edge. This is being done as a customer service enhancement.

4. During the conversion of all ramps to all electronic toll conversion NTTA will evaluate adding the 3rd lane of the service roads. Some of the locations discussed included Lebanon (NB); Eldorado (NB & SB); Panther Creek (NB & SB); CR 24 taper. These also are being considered as customer service enhancements.

Please let me know if you have any further questions.

Cissy Sylo, Director of Engineering Services
 

richard
New member
Username: Movetofrisco

Post Number: 9
Registered: 02-2005
Posted on Tuesday, February 19, 2008 - 10:59 am:   

How can engineering department use a study that shows only 1 lane is needed on a highway service road. That may like that today,
but in the future, if Frisco gets built out,
they will be massive traffic jams like in North Dallas during rush hour.
 

Curt Balogh, Spec. Asst. to the City Mgr
Board Administrator
Username: Admin

Post Number: 504
Registered: 02-2003
Posted on Wednesday, February 20, 2008 - 03:14 pm:   

Per Cissy Sylo, Director of Engineering:

The service roads are ultimately planned to be 3 lanes
 

Mike
New member
Username: Newyork1

Post Number: 6
Registered: 07-2007
Posted on Sunday, April 06, 2008 - 10:51 pm:   

I noticed that there are intersection improvements in the plan for Gaylord/Mall Road F & Parkwood/Hammons. What are they planning to add to these intersections?
Also, how is Lebanon going to be widened to 10 lanes alltogether at the DNT? It looks even now as there's not enough room for that many lanes.
 

Cissy Sylo, Director of Engineering Serv
Moderator
Username: C_sylo

Post Number: 88
Registered: 06-2003
Posted on Thursday, April 10, 2008 - 02:28 pm:   

Kimley-Horn designed plans for the following intersections: Gaylord / Mall Road F, Parkwood / John Q. Hammons, and Main / Teel. Bids were opened for these intersection improvements on March 25. Construction is expected to begin at these locations in summer 2008 and be complete before the end of the year.

The DNT and Lebanon intersection has sufficient room on the bridge for all 10 lanes. It will include dual turns eastbound and westbound. There also will be 3 lanes each westbound and east bound. Lastly a u-turn lane exists for northbound and southbound lanes. There are actually 10 lanes plus the 2 u-turn lanes for a total of 12 lanes on the bridge. West and east of the bridge, additional right-of-way will be necessary in some locations to add right turn lanes and additional areas to align and/or add the additional lanes for capacity. Portions of this right-of-way has already been obtained during the development process such as when the shopping center on the southwest corner developed. However, you are correct, that the curb line will be relocated in some instances to match the bridge.

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