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 of the 4th quarter show that the City met the LOS for all peaks with a LOS C. Unlike previous quarters, the results for the 4th quarter were collected using Bluetooth travel time data that is collected daily for the entire quarter. This method of reading travel times better serves to capture the actual average travel times along US 90 versus capturing one day of data to represent the entire quarter. This method of data collection also now matches how travel times are collected on SH 6.
Comparing the results to the previous quarter showed that the speeds improved on average by 3 mph (40 second travel time improvement) for AM peak, decreased by 4 mph (41 second travel time decrease) for Noon peak, and improved by 4.5 mph (87 seconds travel time improvement) for PM peak. Staff will look to see if adjustments can be made to improve all peaks including the noon peak. With the dynamic nature of US 90, staff is trying to finalize an in-house project that will give better insights to traffic volume through put and train interruptions over the entire quarter which should help with better optimizing corridors and explaining results. Additionally, the adaptive system awarded earlier in year for US 90 is on hold due to communication issues. Once implemented, staff will also look to compare differences.
Average travel times(metrics) for the 4th Quarter are summarized below:
- AM: 6 minutes 0 seconds (29.4 mph, LOS C)
- Noon: 5 minutes 51 seconds (30.2 mph, LOS C)
- PM: 6 minutes 58 seconds (25.4 mph, LOS C)
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.