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SFMTA Retracts Report of 651% Jump in Bike Traffic on San Jose Avenue

8:54 AM PDT on June 23, 2015

The SFMTA has retracted its report last week of a 651 percent jump in bicycling on northbound San Jose Avenue after a traffic lane was removed to widen the bike lane.

The actual increase in morning peak-hour bike counts was 14 percent, said SFMTA spokesperson Ben Jose. In the evening peak hour, the reported 221 percent was actually 62 percent.

"A second analysis of the underlying raw data revealed a spreadsheet error overstating the bicycling increase," Jose said in a statement. "We apologize for our error and will do our best to bring you accurate information going forward."

The agency issued its correction statement late Friday. Streetsblog reported the 651 percent jump on Wednesday after receiving confirmation of the statistics from the SFMTA, following a blog post from the SF Bicycle Coalition highlighting the statistic last Monday.

The newly-released version of the SFMTA's data spreadsheet [PDF] includes a note stating that there was "an equipment malfunction during the AM peak data collection period" on one of the post-implementation days when bikes were counted. The note says the data from that day was removed from the counts, which were averaged over 72-hour periods in January 2014 and January 2015.

The SFMTA says the bike counts were taken on the Monterey Boulevard ramp, just before it merges on to northbound San Jose.

All other data in the report remain accurate, including impacts on car traffic volumes and speeds, said Jose.

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