Traffic - Corridor US Highway 90 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 for the second quarter of FY19 show that the City met the Level of Service for all reported peak times. All peak times also showed travel time and Level of Service improvements when compared to the previous quarter with AM peak time showing a 52 second travel time improvement.
During the second quarter, SH 6/US 90 interchange averaged just over 79,200 vehicles per day followed by US 90/Dairy Ashford with 78,500 vehicles per day, and US 90/Eldridge intersection with 70,600 vehicles per day. The US 90 travel times are heavily affected by adjacent train lines that carry approximately 33 trains per average weekday. The collected train data also confirms that on an average weekday there are approximately 1.3 train interruptions per peak time period. Staff will continue to monitor train activity and work to find ways to minimize effect of interruptions.
Average travel times for Highway 90 between Dairy Ashford and Highway 6 are below:
- AM: 5 minutes 08 seconds (34.3 mph, Level of Service B)
- Noon: 5 minutes 16 seconds (33.5 mph, Level of Service B)
- PM: 6 minutes 44 seconds (26.2 mph, Level of Service C)
Each peak time has a target of C, which means the City aims to have traffic flowing at a minimum of 51-67% of the speed limit. For US Highway 90, this means the City aims to have traffic goal at least 25 - 34 MPH during the AM, noon, and PM peak travel times.
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). This measurement is attained for the AM peak (7-8 AM), Noon Peak (12-1 PM), and the PM peak (5-6 PM), when the major travel corridors in the City of Sugar Land typically experience high travel demands. 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 US Highway 90, this means the City aims to have traffic goal at least 25 - 34 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.