old wellborn road-general parkway traffic analysis

College Station Old Wellborn Road/

General Parkway Traffic Analysis

Study Overview• Purpose• Study Alternatives• Model Results• Observations• Alignment Evaluation – General Parkway• Next Steps

Purpose• Evaluate Old Wellborn Road

• Evaluate Rock Prairie Cross Section

• Evaluate Alternative Routes to provide relief to the Holleman & FM 2818 intersection

Old Wellborn Road• Low Traffic

Volumes

• Traffic Operational and Safety concerns due proximity of railroad and FM 2154

Old Wellborn Rd. Volumes

• Daily Traffic < 2,500 vpd

Old Wellborn Rd. Concerns• Westbound Left from Rock Prairie to Old

Wellborn• 50 feet to railroad – queuing to RR track

• Rock Prairie to be reconstructed• Old Wellborn is recommended to become right-

in, right-out and close when General Parkway is extended.

• Deacon extension to FM 2154• Would require Old Wellborn to be reconstructed

Old Wellborn and Rock Prairie Analysis• Existing analysis - Westbound queue lengths of up to

two (2) vehicles in AM and PM peak• Two vehicles would back up to the railroad and

cause safety concerns

• Future Analysis - Westbound queue lengths of up to five (5) vehicles in the PM peak based on modeling• Would cause queueing into the Rock Prairie

intersection.

• Eastbound queuing from Rock Prairie signal makes left-turns from Old Wellborn Road difficult to navigate.

Future Operations• Assume RIRO operation at Old Wellborn

• All left-turn volumes shift to General Parkway• Removes queuing issue• Improves operations at Old Wellborn and Rock

Prairie

• Adequate queuing space available

• Provide access to developments

Old Wellborn and Rock Prairie Simulations - Existing

WB queue nearly backing into railroad

tracks

Old Wellborn and Rock Prairie Simulations - Future

WB queue nearly backing into Rock Prairie and Wellborn intersection

EB queue backing into Rock Prairie and

Old Wellborn intersection

Future Access

Wellborn Rd

Old Wellborn Rd

Graham

Rd

Rock Prai

rie Rd

General Pkwy

Rock Prairie Cross Section

• West of General Parkway along Rock Prairie:• Both EB and WB traffic reduced by 20%

WBR turn-lane extend just past

General Parkway

Addition of EB lane west of General

Parkway

Holleman & FM 2818 Relief Study Alternatives• General Parkway Extension• Jones Butler Extension• Combined• Luther

Study Alternatives

General Parkway Alternative

Study Alternatives

Jones Butler Extension Alternative

Study Alternatives

Combined Alternative

Study Alternatives

Luther Alternative

General Parkway Alternative

Jones Butler Extension Alternative

Combined Alternative

Luther Alternative

Model Alternative ResultsRoadway Limits #1 #2 #3 #4

Holleman Jones to 2818 10.61% -20.67% -10.06% -8.38%

Holleman 2818 to Dowling 11.67% -10.00% -12.67% -27.67%

Holleman Dowling to Deacon -3.49% -13.10% -2.18% -4.80%

Jones Butler Holleman to 2818 -12.93% 81.03% 75.86% -14.66%

Dowling Holleman to 2818 -46.09% -34.38% -71.09% -38.28%

• #1 – General Parkway Alternative• #2 – Jones Butler Extension Alternative• #3 – Combine Alternative• #4 – Luther Alternative

Alignment Evaluation

Alignment Evaluation

Alignment Evaluation

Observations• Old Wellborn Road

• Roadway provides traffic operation and safety concerns and is recommended to be discontinuous with the Deacon Road extension project and right-in, right-out with the Rock Prairie project.

• Existing traffic can be absorbed with General Parkway

• Main entrance for property south of Graham should be at General Parkway, not Old Wellborn

Observations• Existing Conditions

• Very limited traffic using Dowling to Jones Butler via FM 2818

• Jones Butler between Holleman and FM 2818 is underutilized

• Future Development Conditions with Existing Roadway Network• No new roadway connections• Holleman reaches capacity and Dowling becomes

more heavily utilized• Jones Butler’s volume increases

Observations• Future Conditions with General Parkway

Connection• Provides larger volume reduction to other roads

than Holleman• Shifts traffic away from Dowling• Acts as a circulator to local development• Does not provide relief to Holleman & FM 2818

• Future Conditions Jones Butler Extension• Provides relief to Holleman & FM 2818• Doubles the traffic on Jones Butler

Observations• Future Conditions with Luther Alternative

• Provides greatest relief to Holleman, west of FM 2818

• Provides relief to intersection of Holleman at both FM 2818 and Dowling

• Minimal impact to Jones Butler

Next Steps• Recommend Old Wellborn to be replaced by General

Parkway• Old Wellborn will become a right-in, right-out roadway with the Rock

Prairie Road project • Old Wellborn will not be rebuilt with the Deacon project

• FM 2818 & Holleman • Short – Term: Use signage to encourage the use of

Dowling to Jones Butler

• Long-Term: Gather input from Transportation and Mobility Committee

• Modify the Thoroughfare Plan to include General Parkway realignment?

• Evaluate the constructability/cost of Jones Butler under/overpass?

Questions?