What is an over-dimensional physical route survey?

A physical route survey involves driving the exact permitted route with laser measurement devices and calibrated height poles to verify actual vertical clearances of bridges, overhead utility wires, traffic lights, and tight turning envelopes before a superload departs.

What are NESC and OSHA electrical clearance minimums for superload transport?

Under the National Electrical Safety Code (NESC) and OSHA regulations, superloads must maintain safe clearance zones from energized power lines (minimum 4 to 10+ feet depending on line voltage). If clearance is breached, utility company bucket trucks must lift, insulate, or de-energize lines.

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Heavy Haul Route Survey & Overhead Wire Clearance Checklist

Field engineering checklist and digital audit protocol for specialized heavy transport: measure overhead bridge tolerances, audit National Electrical Safety Code (NESC) wire air-gap clearances, schedule utility bucket truck escorts, and log traffic signal pivots.

Laser Bridge Profiling

Overhead bridge structures sag in center lanes and arch on shoulders. Record precision laser heights across all travel lanes to identify the lowest clearance point down to the half-inch.

Utility Wire Escorts

Energized high-voltage power lines arc across air gaps. Exspeedite schedules certified electric utility bucket truck crews to lift or insulate distribution wires ahead of superload convoys.

Traffic Signal Mast Pivots

For loads exceeding 16 feet in width or height, municipal traffic signals must be unbolted or swung aside by city public works teams with police intersection hold escorts.

Interactive Route Survey Vertical Clearance & Escort Auditor

Total Loaded Vehicle Height (Inches): (204 in = 17'0" Loaded Height)

Lowest Overpass / Structure Clearance (Inches): (216 in = 18'0" Bridge Clearance)

Overhead Power Line Voltage Class:

Traffic Signal Cantilever Obstruction:

Vertical Clearance Safety Buffer & Utility Escort Mandate:

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Enter physical survey measurements above to audit route feasibility.

Over-Dimensional Route Physical Survey Critical Checkpoints

Infrastructure Item	Measurement Standard	Minimum Clearance Margin	Exspeedite TMS Verification Gate
Overpass Girders & Portals	Ultrasonic laser measurement of outside shoulder & crown	6 inches (Daylight) / 12 inches (Night)	CAD route survey certificate upload & permit lock
Distribution Electric (12–34kV)	Height stick survey at mid-span under maximum summer heat sag	48 inches air-gap buffer (NESC Rule 232)	Electric utility confirmation ticket number archiving
Traffic Signals & Overhead Signs	Laser clearance check at lowest cantilever point	6 inches clearance or mechanical pivot plan	Municipal DOT police escort schedule confirmation
Railroad Crossing Grade Profile	High-centered hang-up analysis (humped grade crossings)	Minimum 6-inch ground clearance at trailer belly	Railroad dispatcher emergency notification contacts

Coordinate Precision Heavy Haul Route Surveys with Exspeedite

Integrate mobile survey logs, manage utility bucket truck escorts, and protect your multi-million-dollar superloads from overhead line strikes. Request a software consultation.

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Escort & Heavy Tractor Fleet Size

Primary Survey Scope