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Page 7 of 15 <br />City of Redwood City 1017 Middlefield Road, Redwood City, CA. 94063 Tel: 650-780-7000 www.redwoodcity.org <br />Primary Collision Factors (PCF) <br />Traffic collisions are the result of human behavior/action or infrastructure deficiency. According to <br />Redwood City Police Department data, the top primary collision factors for injury collisions in Redwood <br />City between 2019 and 2024 were: (1) speeding; (2) driving under the influence; and (3) failure to stop at <br />red lights. Speeding has been the most common PCF in Redwood City, contributing to 20 percent of all <br />collisions in the City between 2019 and 2024. Driving Under the Influence (DUI) has been another top PCF <br />in Redwood City, contributing to 13 percent of all collisions. <br />Traffic Patterns in Redwood City <br />The San Mateo County Transportation Authority’s (TA) US 101 Multi-Modal Plan3, conducted an analysis <br />in 2025 on commute patterns within San Mateo County. This study showed about 60 percent of the <br />Redwood City population drives alone to work. Table #3 shows the commute mode share in Redwood <br />City. <br />Table 3: Commute Mode Share in Redwood City, 2023 <br />Mode Percentage <br />Drive Alone 58.9% <br />Carpool 9.4% <br />Transit 3.8% <br />Walk 2.8% <br />Bicycle 1.1% <br />Other 1.3% <br />Work From Home 22.7% <br />Redwood City is home to major regional destinations such as Kaiser and Sequia Hospitals and County <br />offices that attract daily visitors. The TA’s study indicates about 92,000 regional daily trips end in Redwood <br />City, compared to approximately 39,000 for Menlo Park, 48,000 for San Carlos, and 107,000 for San <br />Mateo. This becomes important in selecting measures to address high collision numbers in Redwood City <br />especially measures that are focused on public education since the audience will be broader than <br />Redwood City community. <br />The school commute pattern in Redwood City may also impact traffic patterns as students are assigned <br />to schools that are far from their homes and many families drive to schools. More vehicle trips potentially <br />could increase the exposure and collision rate. <br />Redwood City Walk Bike Thrive Plan <br />The U.S. Federal Highway Administration (FHWA) recommends advancing Vision Zero using a Safe System <br />approach4 to transportation safety planning, design, and implementation. A Safe System approach is <br />based on five key elements: safe road users, safe vehicles, safe speeds, safe roads, and post-crash care. <br />3 https://www.smcta.com/SouthCountyMultimodal <br />4 https://www.transportation.gov/safe-system-approach <br />11.A. - Page 7 of 15 <br />390