Lessons Learned from a chip seal debacle Lea Brooks Bike SLO County Advocate

Highway 1 – Ragged Point

Unstable Surface = Bumpy Ride!

True Grit = Ouch!

Slab Town Rollers: Our Heroes

UC California Pavement Research Center Study

Figure 3.7: Extract of bicycle speed with corresponding acceleration data on Section 5 of Mon-198. (Note:  the red line with circles shows speed (mph), the blue line shows acceleration (g ), and the green line shows the test section portion used for analysis where speed > 5 mph.) UCPRC staff conducted test rides on local roads near Davis, California, to evaluate the instrumentation system and develop the data analysis procedure before using it for this study. A list of bicycle vibration evaluations on the Phase 1 sections is shown in Table 3.7. The testing conducted on July 12 and 13, 2013, allowed evaluation of bicycle vibration on various pavement surfaces, while the testing conducted on July 23, 2013, allowed evaluation of the effects of speed and tire pressure on bicycle vibration.

Pneumatic Roller

Sand & Oil Treatment

Sand & Oil Treatment

Before After COST: $3.3 million! Original chip seal treatment: $2.1 million Sand Seal Fix: $1.3 million

Realignment: The Road & Relationships

Highway 1 Rumble Strips

Pfeiffer Canyon Bridge - Big Sur

“Paul’s Slide” north of Limekiln in Big Sur

Resources Surface Treatment Macrotexture and Bicycle Ride Quality, University of California Pavement Research Center, UC Davis, UC Berkeley, 2013 http://www.ucprc.ucdavis.edu/PDF/UCPRC-RR-2013-07.pdf Caltrans Standard Specifications http://www.dot.ca.gov/hq/esc/oe/construction_contract_standards/std_specs/20 15_StdSpecs/2015_StdSpecs.pdf Chip Seal Treatments are in Section 37 Caltrans contact: Tom Pyle, ‎Chief, Office of Pavement Management, Sacramento CA, tom.pyle@dot.ca.gov Lea Brooks, Bike SLO County Advocate: lea@bikeslocounty.org