TRANSMISSION_SWEPT_PATH_GUIDE • AASHTO SUPERLOAD TURNING • DUAL-LANE DOLLY SPEC

Utility Superload Turning Swept-Path Guide

Highway route engineering manual for multi-axle utility superloads: steerable rear dolly swept-path modeling, tight 90° intersection off-tracking, overhead wire lift escorts, and state DOT bridge authorizations.

01 Vehicle Dimensions & Curve Geometry

Feet
° (Override)
Feet
Feet

02 Swept-Path Envelope & Clearance Telemetry SWEPT ENVELOPE CLEARED

Total Swept Path Corridor 31.4 ft Width Pavement: 36.0 ft (+4.6 ft clearance)
Rear Bogie Off-Tracking 15.2 ft Dolly steering saved 18.5 ft
Overhead Wire Lift Escort Bucket Trucks Required (> 17 ft)
Certified Utility Linemen 2 Line Crews Assigned
State Police Escort Formation 4 Cruisers (Front, Rear, Rolling)
DOT Bridge Center-Line Run Mandatory Strict Centerline

Swept path width fits available pavement without wheel climbing curbs. Steerable rear dolly active remote control reduces curb off-tracking into oncoming lanes.

Active Rear Steerable Bogies

19-axle superloads feature an independent tiller operator stationed in an auxiliary rear steering cab or using wireless proportional radio remotes. Counter-steering the rear dolly dramatically cuts cornering swept path in tight rural intersections.

Overhead Utility Wire Lifts

When gross vehicle height exceeds 16 feet, utility coordination is mandatory. Local power, telecommunication, and cable TV linemen escort the convoy with insulated fiberglass hot-sticks and bucket trucks to elevate overhead service drops safely.

State DOT Bridge Structural Permits

Superload bridge permits specify precise crawling speeds (5 MPH) and mandatory bridge centerline traversal with zero other vehicular traffic on the structure, spreading axle bending moments evenly across primary steel girders.

Streamline Complex Superload Permitting with Exspeedite

Manage state DOT oversize/overweight permits, route turning simulations, police escorts, and utility wire lift crews across multi-state heavy transport corridors with Exspeedite TMS.