Santa Clara Street to Alum Rock Foothill Arterial
At a glance: Graded 47 out of 100 (Tier 2: Multi-Lane Urban Arterial) across 6.1 miles in Silicon Valley. East-west Silicon Valley corridor transitioning from downtown San Jose transit lanes across US-101 and I-680 toward the Diablo Range foothills.
Why this corridor sits in Tier 2
Running directly along an east-west solar azimuth axis, Santa Clara Street and Alum Rock Avenue experience pronounced sunrise and sunset horizon glare in addition to US-101 and I-680 interchange weaving and center-running bus rapid transit stations.
Key roadway traits
- Dedicated BRT median stations
- US-101 & I-680 ramp interfaces
- Low-angle east-west solar glare
Four-factor geometric & crash decomposition
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Connected highway & local crash profiles
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Other Tier 2 California corridors
Methodology & interpretation limits
Complexity Index combines horizontal curvature, sustained elevation grade, speed-transition demand, and 12-month historical reported crash concentration per corridor mile. Counts describe observational public records unadjusted for daily traffic volume and do not represent driving safety advice. Missing-coordinate collision records in surrounding cities are reported separately in live buffered queries and are never plotted at synthetic coordinates.
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