SOURCE: Zendrive


March 30, 2015 09:00 ET

Study Reveals the Top 10 Risky Intersections for Cyclists in San Francisco Due to Distracted Drivers

Zendrive Driver-Centric Analytics and Human Activity Tracking Study Promotes Safety, Caution and Awareness for 75,000 Bicyclists

SAN FRANCISCO, CA--(Marketwired - Mar 30, 2015) - A recent study by Zendrive, the driver-centric analytics company, and Human, one of the most popular activity trackers in the iOS App Store, used driving and cycling data to identify the 10 most dangerous hotspots for the 75,000 bicyclists in San Francisco due to distracted driving. 

"Police data* found that a bicycle/car collision resulting in significant injuries happens on average once a day," said Zendrive CEO Jonathan Matus. "Not all collisions are reported to the police, so we wanted to see how else we could use Zendrive's driving data and Human's cycling data to raise awareness of these dangerous zones. Cyclists should use caution in these areas, and drivers should put down their phones."

Zendrive's technology measures driving safety using only the sensors on a driver's phone, analyzing the safety risk of a driver or fleet. Within the course of our work, we've tracked 1100 drivers over 37,500 miles across San Francisco, and measured multiple dangerous behaviors, including speeding and cell phone use while driving. Any of these behaviors can be the cause of a collision with a bike, but we found that phone use while driving constitutes a special hazard to cyclists. We summed up the driver behaviors per intersection, and found the areas of San Francisco with the worst driving habits.

Zendrive teamed up with Human to look at the areas of San Francisco with the most bike traffic -- more bicyclists means a higher chance of a bicyclist being hit -- then combined that data with our dangerous driving behavior map to discover where drivers and cyclists need to look twice before crossing.

The Top 10 Risky SF Cycling Hotspots due to Distracted Driving:

1. Fell St. (Broderick to JFK curve)
2. Duboce Ave. (Folsom to Bryant)
3. Folsom (7th Street to 14th Street)
4. 8th St. (Howard to Harrison)
5. 10th St. (Mission to Folsom)
6. Brannan and Division Interchange
7. Oak St. (Panhandle to Scott)
8. Church St. (15th to Market)
9. Duboce and Sanchez
10. Duboce and Valencia

"This study underscores the need for a comprehensive, safety-first approach on our city streets," said Tyler Frisbee, Policy Director at the San Francisco Bicycle Coalition. "San Francisco can reduce traffic deaths and serious injuries to zero, which is what the City has committed to with a concrete approach known as Vision Zero. Encouraging everyone to pay attention is a crucial part of improving our streets, and hopefully this study will re-emphasize the need to prioritize safety when designing our roadways."

For the complete study, including maps of SF bike collisions and distracted driving, visit the Zendrive Blog HERE.

About Human

Human helps people move almost twice as much in six weeks. Every day, people track millions of activities with the Human app, one of the most popular activity trackers in the iOS App Store. Human visualizes 7.5 million miles of activity in major cities all across the globe to get an insight into Human activity. Walking, running, cycling and motorized transport all tell us different stories. For more information about Human, visit

About Zendrive

Founded in 2013 and based in San Francisco, CA, Zendrive makes driving better, safer, and more efficient for everyone through improved data and analytics. Using mobile tech and big data, its flagship service ZenFleets brings driver-centric analytics to the On-Demand driving economy, i.e. rideshare, carshare, taxi, valet and last-mile services. Zendrive Accident Detection is the company's newest service. Investors include First Round Capital, BMW i Ventures, Bill Ford's Fontinalis Partners, as well as founders of Yahoo, PayPal, and GenRe reinsurance. For more information about Zendrive, visit, and follow @zendrive on Twitter.

*Police Data is available through a request from the SF Mayor's Office.

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