Traffic Signal Warrant Analysis
Signals justified by data—aligned with MUTCD and community needs.
DeShazo Group’s Traffic Signal Warrant Analysis (TSWA) helps developers, communities, and agencies make informed decisions about intersection improvements. By following MUTCD guidelines, we identify locations where a traffic signal can enhance safety, reduce crashes, and improve access to new and existing developments—for drivers, pedestrians, cyclists, and transit users.
Our process pairs on-the-ground observations with turning-movement counts, operations analysis, and crash history review. We coordinate closely with cities, counties, and DOTs to evaluate alternatives—such as all-way stop control, channelization, access management, or timing changes— and recommend the right treatment at the right time.
What we do
- Field audits & data collection: lane geometry, access points, sight distance, pedestrian activity; 15-min turning counts as appropriate (AM/PM peak, school peaks, special-generator peaks).
- MUTCD warrant screening: evaluate vehicular volume, pedestrian volume, school crossing, coordinated system, crash experience, peak-hour and network/route-continuity considerations.
- Operations & safety analysis: queueing, delay, progression, turning conflicts, and crossing delay for people walking and biking.
- Alternatives & phasing: compare all-way stop, access changes, channelization, roundabout, or signalization; define near-term and ultimate improvements.
- Agency coordination: collaborate with city/county/DOT staff on assumptions, timing plans, and approval processes.
- Documentation: clear exhibits and warrant worksheets suitable for public meetings, development hearings, and funding applications.
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Why it matters
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- Safety & access: reduce conflict points and provide protected crossings for pedestrians and cyclists where warranted.
- Network performance: align signal timing with corridor progression to manage delay without unnecessary widenings.
- Compliance & transparency: MUTCD-based findings support clear decisions and defensible approvals.
- Growth & connectivity: improve access to new developments while maintaining reliable operations for the broader community.
MUTCD Alignment
Recommendations grounded in nationally recognized criteria.
Crash & Conflict Focus
Targeted treatments at locations with documented safety concerns.
Access Reliability
Improved ingress/egress for new and existing developments.
Proven Experience
Representative TSWA assignments:
Development Access Intersections
Signal need and phasing for retail, mixed-use, and employment centers.
School & Pedestrian Crossings
Peak and mid-day pedestrian volumes, crossing protection, and timing.
Corridor Coordination
Progression checks and network warrants on arterial corridors.
Crash Experience Locations
Safety screening with targeted countermeasure recommendations.
Agency & DOT Reviews
MUTCD-based documentation supporting approvals and funding requests.
