Traffic Impact Analysis

Clear, defensible traffic studies for smarter approvals

DeShazo Group prepares Traffic Impact Analyses (TIA) for developments across Dallas–Fort Worth, Texas, and the United States—with the ability to align with international standards when projects require it. We quantify project trips and model intersection & corridor performance (LOS, delay, v/c) to design right-sized mitigations— turn lanes, signal timing, access management, and multimodal circulation—that keep people and goods moving safely.

Proven North Texas Experience

TIAs delivered across the DFW region for mixed-use, retail/restaurant, schools, healthcare, office/industrial, and corridor studies. We coordinate with City/County/TxDOT and NCTCOG, following ITE Trip Generation and the Highway Capacity Manual (HCM) for review-ready submittals; and we can adapt to international manuals (e.g., DMRB/Austroads/TAC) when required.

Get Started

What we do

  • Scoping & coordination with City/County/TxDOT; study area/intersection selection.
  • Data & surveys — turning counts, speeds, queues, pedestrian/bike activity.
  • Trip generation & assignment — ITE TripGen/Trip Generation Manual, internal capture, pass-by, distribution/routing.
  • Background growth & horizons — growth rates, pipeline developments, opening-year and horizon-year scenarios.
  • Capacity & LOS — HCM methods; Synchro/SimTraffic or VISSIM where needed.
  • Queues & storage — turn-bay length, tapers, spillback risk, drive-through validation.
  • Access & circulation — driveway spacing, loading, pickup/drop-off, internal wayfinding.
  • Mitigation & phasing — laneage, signals/timing, signing/marking, access management.
  • Warrants & justifications — signal warrants, turn-lane warrants, traffic calming applicability.
  • Multimodal, freight & ADA — pedestrian/bike desire lines, transit interfaces, accessible circulation, freight movements.
  • Standards & submittals — align with FHWA/MUTCD and local manuals; can map to DMRB/Austroads/TAC for international work.
  • Documentation & testimony — scoping letters, clear exhibits/tables; responses and public hearing support.
Aerial freeway interchange illustrating capacity, weaving, and queue analysis

Why it matters

  • Approvals & predictability — jurisdiction-aligned submittals reduce review cycles.
  • Safety & access — right-sized storage, sight distance, and signal control cut crash risk.
  • Mobility — protects corridor progression and reduces congestion/queuing.
  • Cost control — phased, targeted improvements that avoid over-building.
  • Review certainty — scoping letters and warrant worksheets aligned with reviewer checklists minimize resubmittals.

Example projects

  • Urban mixed-use redevelopment and lifestyle centers
  • School circulation and dismissal management plans
  • Medical campus expansions and emergency access
  • Drive-through restaurants / outparcels on urban arterials
  • Corridor access management & intersection improvements
Dallas urban streetscape and development context for TIA recommendations
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