Coronado Peninsula Low-Grade Corridor
At a glance: Graded 24 out of 100 (Tier 1: Calm Grid & Orientation) across 3.8 miles in San Diego. Flat coastal surface streets with wide lane markings, predictable signal phasing, and clearly delineated bike and pedestrian zones.
Why this corridor sits in Tier 1
Coronado’s peninsula topography eliminates vertical grade transitions while channeling regional traffic along Orange Avenue (SR-75). Sightlines remain wide along the landscaped median, with primary geometric attention required at the multi-leg RH Dana Place junction and beachfront pedestrian crossings.
Key roadway traits
- 0.8% max slope
- Divided median boulevard
- Low-speed pedestrian crossings
Four-factor geometric & crash decomposition
0 to 100 scaleCorridor alignment & sightline inspection
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Connected highway & local crash profiles
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Other Tier 1 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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