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 third quarter of FY19 show that the City met the level of service for all reported peak times. Although AM & PM peaks showed small travel time improvements of 3-12 seconds, the noon peak showed a small travel time increase of 13 seconds, which caused the level of service to drop from a B to C.
The small increase in the noon peak travel time is likely due to a small increase in train interruptions, which went up from 104 to 115 interruptions at Eldridge Road. The average train duration also increased from 15 seconds in the third quarter (3.87 to 4.12 minutes). The increase in duration is an indicator of train lengths that are also increasing, which has been advertised by rail companies to improve their operations.
The US 90 travel times are heavily affected by adjacent train lines. Staff will continue to monitor train activity and work to find ways to minimize effect of interruptions.
During the third quarter, SH 6/US 90 interchange averaged just over 81,000 vehicles per day (vpd) followed by US 90/Dairy Ashford with 82,200 vpd, and US 90/Eldridge intersection with 70,500 vpd. Two of the three main interchanges both saw slightly increased vehicles per day.
Average travel times for Highway 90 between Dairy Ashford and Highway 6 are below:
- AM: 5 minutes 5 seconds (34.7 mph, Level of Service B)
- Noon: 5 minutes 29 seconds (32.2 mph, Level of Service C)
- PM: 6 minutes 32 seconds (27 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 a traffic goal of 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 a traffic goal of 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.