Traffic - Corridor State Highway 6 Performance
Great Place To Live
Status Indicators: Proceeding as Anticipated | Monitoring Progress | Reviewing for Improvement | Information Unavailable
Proceeding as Anticipated
Reviewing for Improvement
The results of the 4th quarter showed that the City met or exceeded LOS C targets for the AM and Noon Peaks but failed to meet LOS for PM Peak. Comparing the results to the previous quarter showed that the speeds improved on average by 2 mph (24 second travel time improvement) for AM peak, there was negligible change (4 second travel time decrease) for Noon peak, and decrease by 1 mph (27 seconds travel time decrease) for PM peak. The 1 mph change translated to a LOS change of C to D.
The SH 6 section north of 59 still continues to be the slowest. The scheduled expansion of SH 6 from 3 lanes to 4 lanes will help and construction is now scheduled to begin in January. An update to the way adaptive system handles SH 6/US 59 was implemented which shows improvements with the SB US 59 frontage road queues being cut shorter. Staff is finalizing an in-house project that will give better insights to traffic volume through put over the entire quarter which should help with optimizing corridors and conveying the results.
Average travel times for the 4th quarter are summarized below:
- AM: 5 minutes 51 seconds (36.2 mph, LOS B)
- Noon: 8 minutes 1 seconds (26.4 mph, LOS C)
- PM: 9 minutes 33 seconds (22.2 mph, LOS D)
Per the 2010 Highway Capacity Manual, this metric is calculated as the average measured travel speed over the posted speed limit for the corresponding major corridor (avg. speed / posted speed limit). The calculated value is converted into a percentage and translated into a letter grade indicative of a level of service (A is the best, F is the worst). The slower the measured speed compared to the posted speed limit, the lower the level of service.
Measured major travel corridors include:
State Highway 6 (Dulles to Brooks St.) - 45 MPH
US Highway 90 (Dairy Ashford Blvd. to SH 6) - 50 MPH
Standard Levels of Service are classified by the 2010 Highway Capacity Manual.
A: ≥86% B: 68%-85% C: 51%-67% D: 41%-50%
E: 31%-40% F: ≤30%
A target of C means the City aims to have traffic flowing at a minimum of 51-67% of the speed limit. For Highway 6, this means the City aims to have traffic goal at least 23 - 30 MPH during the AM, noon, and PM peak travel times.
The City of Sugar Land's most vital vehicular travel corridors support commercial enterprise and quality of life. Shorter travel times help improve both commercial enterprise and quality of life.