The City of Oakland has been installing bicycle parking racks on asphalt streets since 2012. We started out using a combination of anchor bolts and spikes, like we use for sidewalk racks, only longer (6” to 8 ½”). We found that, soon after installation, even with six pieces of long hardware for each inverted U rack—many of the racks started loosening, and had to be reinforced with epoxy . . . which didn’t work well either because once asphalt heats up, the epoxy moves with the rack. We next considered installing concrete pads, an expensive, labor-intensive alternative with ramifications for paving maintenance.
When I learned about Asphalt Anchors from a colleague at the University of California at Davis, I was anxious to try them out, and have been delighted with (and relieved by) the results. Oakland has 27 on-street bike parking corrals, and 21 of them are on asphalt. Since we started using the Asphalt Anchors in 2015, the racks have stayed firmly in place. Even when a rack is nudged by a car, the galvanized steel loop is more likely to bend at the weld than the anchors are to pull out.
Bicycle & Pedestrian Facilities Coordinator, Safe Streets Division
City of Oakland | Department of Transportation