TL;DR
Route surveys assess transportation corridors for OS/OW loads by documenting physical constraints (bridges, utilities, road width), measuring clearances, photographing conditions, and recording GPS coordinates. Essential for safe transport, permit compliance, and liability protection.
Route Survey Basics
Professional route surveying is the foundation of safe and efficient OS/OW transportation. This guide covers the fundamentals of conducting thorough route surveys, from planning and equipment to documentation and reporting.
What is a Route Survey?
A route survey is a detailed, on-the-ground assessment of a transportation corridor. Unlike desktop route planning, a survey involves physically traveling the route to:
- Identify all physical constraints and obstacles
- Measure exact clearances at bridges, utilities, and structures
- Document road conditions, grades, and turning areas
- Photograph critical points for reference and reporting
- Record GPS coordinates for accurate mapping
- Assess potential issues not visible on maps
Why Route Surveys Matter
Safety
Prevent accidents by identifying low bridges, narrow roads, and other hazards before the load is en route.
Permit Compliance
Many jurisdictions require route surveys for superload permits, especially for extreme dimensions.
Cost Control
Avoid expensive delays, detours, and damage claims by knowing the route conditions in advance.
Liability Protection
Documented surveys provide evidence of due diligence in case of disputes or claims.
Essential Equipment
| Equipment | Purpose |
|---|---|
| GPS Device / Smartphone | Record coordinates of constraints and waypoints |
| Height Measuring Pole | Measure vertical clearances at bridges and utilities |
| Laser Rangefinder | Quick, accurate distance measurements |
| Camera | Document conditions with photos and video |
| Measuring Tape/Wheel | Road widths, shoulder measurements |
| Safety Vest & Cones | Personal protection during roadside work |
How to Conduct a Route Survey
- Pre-Survey Planning
Review the proposed route on maps, identify known constraints from databases, gather load specifications (height, width, length, weight), and plan your survey schedule.
- Equipment Preparation
Charge GPS device, ensure camera has adequate storage, calibrate measuring tools, pack safety equipment, and verify data collection app is working.
- Initial Route Drive
Travel the entire route at moderate speed to get a general sense of conditions, traffic patterns, and areas requiring detailed inspection.
- Document Constraints
Stop at each potential constraint—bridges, overpasses, utilities, narrow sections—to measure clearances, photograph, and record GPS coordinates.
- Assess Turn Movements
Evaluate intersections, turns, and access points for adequate turning radius, sight lines, and potential obstructions during maneuvers.
- Compile Survey Report
Organize collected data into a professional report with maps, constraint tables, photos, measurements, and recommendations.
Common Constraints to Document
Frequently Asked Questions
What is a route survey?
A route survey is a detailed assessment of a transportation corridor to identify constraints and conditions affecting OS/OW load movement.
Why are route surveys necessary?
Route surveys ensure safe passage, meet permit requirements, identify problems before the move, and provide liability protection documentation.
What equipment is needed?
Essential: GPS device, height measuring tools, camera, measuring tape, and safety equipment. Optional: laser rangefinder, drone.
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