Candidate for fully permeable shoulder retrofit validation site
UCPRC and Caltrans Following Up Study on Pavement Texture and Roughness and Bicycle Ride Quality.
Applying the lessons learned from its first study of how pavement texture and roughness affect
bicycle ride quality, the UCPRC will conduct a follow-on study with an expanded research
scope and a shifted focus. This study will build on the first study’s findings about rural
routes and long-distance road riders by investigating urban/suburban pavement surfaces and
commuter bicyclists. The study will also include a more diverse set of participants and broader
selection of test section types than were used in the initial study. The new study will also focus on more
closely tying preservation and maintenance treatment materials specifications to bicycle ride quality.
This changed approach will allow Caltrans and local governments to address a greater number of
stakeholders and improve the riding experience on a broader range of bicycle networks.
The earlier study, completed in spring 2014, primarily focused on the effects that
preservation treatments used on state highways had on bicycle ride quality. Data for the
study were gathered by volunteer riders from California long-distance road cycling
clubs, some using instrumented bicycles. Based on the results of the study, UCPRC was
able to quantitatively correlate participant feedback with texture measurements. Testing
in the first study included:
- Laser Texture Scanner measurements
- Pavement surface profiling using a High-Speed Profiler Vehicle with Profiling Equipment
- Collection of accelerometer data from bicycles (to measure vibration)
The research over the next 18 months will include more bicycle-specific
roadways (bike paths and bike lanes) and state highways, as well as a
broader range of bicycle types (commuter and recreational street type).
More information about the upcoming study and the findings of the completed
UCPRC/Caltrans study will be presented in three different sessions at the
upcoming Transportation Research Board (TRB) Annual Meeting in Washington, D.C.:
Measurement of Pavement Treatment Macrotexture and Its Effect on Bicycle Ride
Quality (15-0080), Session 443: Pavement Surface Characteristics. Monday, January 12, 2015, 4:15 PM to 6:00 PM.
Modeling the Impact of Pavement Roughness on Bicycle Ride
Quality (15-3542), Session 742: Pavement Macrotexture, Roughness and Roughness-iInduced
Issues. Tuesday, January 13, 2015, 7:30 PM to 9:30 PM.
Bicycle Vibration and Pavement Ride Quality for Cyclists (15-4672), Session 849: Bicycle
Transportation, Part 2: Safety and Infrastructure (Part 1, Session 477). Wednesday, January 14, 2015, 2:45 PM to 4:30 PM.
Important Note for Caltrans Users: Prior
to scheduling pavement preservation (preventive maintenance or CAPM) or roadway
rehabilitation work on flexible pavement highway sections, the District Materials
Engineer and/or the Project Manager should review
this spreadsheet to
ensure that the proposed project does not include sections active in
the “Quieter Pavement Research” (QPR) testing program. If the proposed
project is within a QPR test section, please
contact Linus Motumah of the
Caltrans Office of Pavement Design before scheduling the work.
To view maps that show where the sections are located, click the following
(or copy-and-paste it into a new browser window for a slightly larger view).
For more information,
contact John Harvey of the UCPRC or