Rengstorff Avenue is formally designated on both Mountain View's and the regional MTC High Injury Networks due to a disproportionate history of severe pedestrian and bicyclist collisions. While the City has released three uniform corridor concepts (Concept 1: Buffered Lanes, Concept 2: Class IV Road Diet, Concept 3: AAA Green Spine), our analysis recommends a Segmented Hybrid Complete Streets Strategy tailored to distinct land-use contexts across the 1.7 miles:
Concept 2 Hybrid: Class IV protected bikeway with one-side parking preservation and floating bus boarding islands, protecting vulnerable renters' parking needs.
Concept 3 (AAA Spine): Two-way separated sidepath along Rengstorff Park & Castro Elementary, continuous bioretention swales, and 60+ new shade trees.
Concept 2/3 Hybrid: 4-to-3 road diet to eliminate dangerous speeding (>38 mph) and raised Class IV bikeways connecting to regional trails.
Corridor Analytics & Performance Comparison
Data-driven evaluation of safety, resident priorities, and multi-criteria performance.
Crash Modification Factors (CMF) benchmarked across standard FHWA safety models and local California Street pilot metrics.
Key corridor challenges identified by community members during Round 1 engagement (February 2026).
Comprehensive evaluation scoring across 7 dimensions (0–10 scale). The Recommended Hybrid achieves the optimal composite score by capturing the safety/greening of Concept 3 while preserving parking equity and cost feasibility.
Corridor Segment Breakdown & Technical Profile
Existing geometric, traffic, and land-use conditions across the 1.7-mile study area.
| Segment | Length | ROW / Width | Existing Configuration | Traffic Volume (ADT) | Key Intersections & Anchors |
|---|---|---|---|---|---|
| 1. El Camino to California St | 0.35 mi | 60–70 ft ROW (40–44 ft curb) | 2 travel lanes + TWLTL, Class II bike lanes | ~14,000 ADT | El Camino Real (SR 82), Latham St (AI Signal), California St |
| 2. California St to Central Expy | 0.35 mi | 60–66 ft ROW (40–44 ft curb) | 2 travel lanes + turn bays, Class II / sharrows | ~15,500 ADT | San Antonio Caltrain Crossing, Crisanto Ave, Central Expy (34k ADT) |
| 3. Central Expy to Middlefield Rd | 0.55 mi | 70–84 ft ROW (50–60 ft curb) | 2–4 travel lanes, Class II bike lanes | ~16,200 ADT | Rengstorff Park, Community Center, Castro Elementary, Monta Loma |
| 4. Middlefield Rd to Leghorn St | 0.45 mi | 80–100 ft ROW (60–70 ft curb) | 4 travel lanes + median, Class II bike lanes | ~18,100 ADT | Middlefield Rd (20k ADT), Old Middlefield Way, US 101 Ramps |
Inter-Project Relationship & Regional Coordination
How the Complete Streets Study integrates with major ongoing capital investments in Mountain View.
City Council prioritized the Rengstorff rail underpass over Castro St. Interim Complete Streets surface improvements are designed with modular elements to ensure cost-efficiency before heavy civil rail construction.
Fully operational AI-assisted video detection with protected left-turn phases in all four directions and continental crosswalks, resolving one of the corridor's historic high-collision conflict points.
Northern terminus aligns with VTA's regional interchange reconfiguration, ensuring continuous Class IV bikeway connections across Highway 101 to North Bayshore tech hubs and bay trails.