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Doug
New member
Username: Doug

Post Number: 38
Registered: 08-2003
Posted on Thursday, September 27, 2007 - 10:11 pm:   

Are right turn lanes required to be constructed when a business develops an adjacent lot? I thought they were, but the CVS at Legacy and Main was built without any.
 

Kimberly Dalton, EIT
Moderator
Username: Kim_dalton

Post Number: 2
Registered: 07-2007
Posted on Wednesday, October 03, 2007 - 11:30 am:   

Doug,

Right turn lanes are required to be constructed when corner parcels are developed. CVS was not required to construct a right turn at Legacy/Main because there is an existing southbound to westbound left turn lane on the ground that was constructed when Legacy Drive was extended north to Eldorado Parkway. Additional turn lanes will be constructed as the commercial development continues to grow and additional driveways will be built.

Sincerely,

Kimberly Dalton
 

Doug
New member
Username: Doug

Post Number: 39
Registered: 08-2003
Posted on Tuesday, November 13, 2007 - 07:16 pm:   

Kim,

What about the entrance into the CVS? I thought there would be a right-turn lane on West-bound Main just past Legacy, so traffic wouldn't be impacted when someone turns into the CVS parking lot.
 

Brian Moen, Asst. Dir. Eng. /Transp
Moderator
Username: Brian

Post Number: 327
Registered: 07-2001
Posted on Wednesday, November 14, 2007 - 10:03 pm:   

Doug,

The thoroughfare standards ordinance allows a driveway downstream of an intersection that is 100 to 170 feet from the right-of-way line of the intersecting street. See fig 6-14 of the following link on page 21.

http://friscotexas.gov/uploadedFiles/Departments/engineering/ThoroughfareDesign- October2004.pdf

While it would be desirable to have a right-turn lane here, a standard turn lane will not fit. The defined window is a result of providing space for the driveway in question and allowing a driveway and a right-turn lane at the first allowed median opening downstream of an intersection (425' in this case, as shown in Fig 6-6 on page 10). The standards don't really have an illustration of what I am describing. If you would like, you can call me at 972-292-5450 and I can explain it over the phone.

Thanks
Brian Moen
Asst. Dir. Eng. Svcs./Transportation
 

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

Post Number: 484
Registered: 02-2003
Posted on Wednesday, January 02, 2008 - 04:28 pm:   

From Brian C: Posted on Saturday, December 15, 2007 - 03:27 am:
________________________________________
Can the city look into refining these ordinances or setting up a fund to add turn lanes.

Preston is notorious for lack of turn lanes, example is Tom Thumb shopping center, La Hacienda Ranch area, etc.

Also, I know the ordinance but allowing the Sprouts shopping center to have an entrance without a turn lane just north of Lebanon is going to create more traffic problems.

Has the city considered a fund to add lanes and improve Preston traffic flow?
 

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

Post Number: 485
Registered: 02-2003
Posted on Wednesday, January 02, 2008 - 04:30 pm:   

Turn lanes into private developments are funded by the developers. A large majority of the existing development on Preston was approved prior to our thoroughfare standard ordinance adoption in early 2001 which requires right-turn lanes into all non-residential uses. These developments include Tom Thumb, Hooters, La Hacienda, Frisco Bridges, Kroger, etc. Another caveat is since Preston is a state roadway, the TxDOT turn lane design criteria must be followed. The storage and transition requirements for these turn lanes is longer than the allowed driveway spacing. Our ordinance is used to allow the driveways, but the TxDOT design criteria then governs the length of the turn lane. If the turn lane cannot fit, it is not provided.

In the case of Sprouts, our ordinance allows a driveway without a right-turn lane just downstream of the intersection. We were able to work with the developer to move the driveway further from Lebanon, but it could not move far enough north to provide the room needed to fit in a turn lane without affecting the turn lane for the next driveway.

We do not plan to implement a fund to build these turn lanes into private developments at a later date. We are working on securing funding to add right-turn lanes at several of the signalized intersections along Preston over the next several years.

Thanks
Brian Moen
Asst. Dir. Eng. Services

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