Bicycle-Vehicle Collisions in Danville: Trends and Hotspots
Introduction: From 2009 to 2025, Danville, California, has experienced a concerning number of bicycle-vehicle collisions. An analysis of 188 collisions, reveals alarming patterns regarding where these collisions occur. Cluster Map - 188 Bike vs Vehicle Collisions
Key Findings: Between 2017 and 2025, Danville has seen an average of 15 bicycle-vehicle collisions annually. While the numbers fluctuate yearly, with a significant rise in 2020 (19 collisions) and a noticeable drop in 2022 (11 collisions), the total number of incidents remains concerning.
Between 2020 and 2025, Danville has averaged 15 bicycle-vehicle collisions annually. A breakdown of the data from 2020 to 2025 shows:
- 2024: 14 collisions
- 2023: 12 collisions
- 2022: 11 collisions
- 2021: 18 collisions
- 2020: 19 collisions
High-Collision Routes and Locations: The collisions occurred on specific roads and intersections, highlighting high-risk areas for cyclists. Among these, the following routes stand out as major collision hotspots:
- Camino Tassajara & Sycamore Valley Rd: This major bicycle route - combined for 24 collisions. Camino Tassajara had 16 collisions, with Blackhawk Rd, Crow Canyon Rd, and Liverpool contributing significantly to the total number of collisions. While Sycamore Valley Road had 8 collisions, with 4 at Camino Ramon
Buffered Bike Lane - San Ramon
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- San Ramon Valley Blvd: With 22 collisions, this road is a particularly dangerous stretch for cyclists. Iron Horse Trail crossings, Railroad Ave, and Sycamore Valley Rd are also notable areas of concern on this route.
- Diablo Road: With 21 collisions, Diablo Road is another frequent site of bicycle-vehicle collisions. The highway 680 on/off ramps contribute to 5 of these collisions, making this a critical area for intervention.
- Iron Horse Trail Crossings: A high concentration of collisions at the trail's crossing points, with 13 collisions reported. San Ramon Valley Blvd alone accounts for 6 of these collisions.
- Hartz Ave: With 9 collisions reported at intersections at East/West Prospect Ave (4), Linda Mesa Ave (2) and one each at Church St, Diablo Rd and Railroad Ave. Consider Installing Signs - Bike May Use Full Lane - Hartz Ave
Install Bike May Use Full Lane Signs and Green Back Sharrows on Hartz Ave
Collision Hotspots: The analysis identifies several "hotspot" locations where bike-vehicle collisions are more frequent. These locations include intersections and road segments that repeatedly see collisions. The list of hotspots illustrates the areas in which increased focus on cyclist safety measures could make a significant impact. Danville's bike-vehicle collision data paints a clear picture of the safety risks faced by cyclists in certain parts of town.