Transportation

Load Allowances

Updated on Friday December 16 2016 at 15:30 PM.

Seasonal load allowances

SPECIAL ADVISORY: Buffalo River Bridge
SPECIAL ADVANCED ADVISORY: Frank Channel Bridge
Seasonal load allowances

The ‘winter load tolerance’ allowance gives the trucking industry the opportunity to increase load capacity by 500 kg per axle not including steering axles.  This allowance does not permit for any accumulative overweight on: A-train, B-train, C-train or Super B-train truck and trailer configurations.  The table below gives estimates for the winter load tolerances.

These load allowances will be enforced to best protect and preserve the NWT highway system. DOT will continue to monitor the highways and will further update on seasonal load allowances.

WINTER LOAD TOLERANCE SPECIFICATIONS

WINTER LOAD TOLERANCES WILL BE ALLOWED ON THE FOLLOWING HIGHWAYS

VEHICLE CONFIGURATION

GVW, KG

WLT, KG

HIGHWAY

SECTION

Single Axle Straight Truck 16,400 16,900 Hwy 1 Km 0 – Km 690 (excluding Liard & Mackenzie River Crossings)
Tandem Axle Straight Truck 24,300 25,300 Hwy 2 Km 0-49
Tridem Axle Straight Truck 31,300 32,800 Hwy 3

Km 0-338

Straight Truck Combination Full Trailer 53,500 57,000 Hwy 4 Km 0-69
Tandem Axle Semi-Trailer/Truck Tractor 39,500 41,500 Hwy 5

Km 0-266

Tridem Axle Semi-Trailer/Truck Tractor 46,500 49,000 Hwy 6 Km 0-90
A-Train Truck and Trailer 53,500 53,500 Hwy 7 Km 0-254
B-Train Truck and Trailer Combinations 63,500 63,500 Hwy 8 Km 0-272.5
C-Train Truck and Trailer Combinations 58,500 58,500



SPECIAL ADVISORY:Buffalo River Bridge

The Buffalo River Bridge, which is located on Highway 5 at km 55.7, is undergoing rehabilitation.

During construction from April 18th to October 30th 2017, there will be intermittent road closures for up to 30 minutes. Please observe the reduced speed limits within the construction zone, where speed fines are double.

Vehicles exceeding the width or height restriction will need a pre-approval.

November 18, 2016 to
April 18, 2017
April 18, 2017 to
July 20, 2017
July 21, 2017 to
October 31, 2017
  • Single lane (Up to 4.0 meters wide, 5.1 meters high allowed)
  • Permit vehicles will be assessed
  • Single lane (Up to 4.0 meters wide, 5.1 meters high allowed)
  • No overweight loads allowed
  • Single lane (Up to 3.1 meters wide, 4.5 meters high allowed)
  • Lanes will be alternating
  • No wide loads will be allowed
  • No overweight loads allowed



SPECIAL ADVANCED ADVISORY:Frank Channel Bridge


Rehabilitation of the Frank Channel Bridge will start in May 2017, with Construction taking place between May and October each year of 2017, 2018, and 2019. 

During this period, the following restrictions will apply:

May 1, to October 31 2017

Nov 1, 2017 to April 30, 2018

May 1 to October 31, 2018

  • Speed Limit: 15 km/h
  • Single lane traffic
  • Expect delays up to 30 minutes due to construction activity
  • Emergency vehicles will be accommodated first at all times

Commercial Vehicles Restrictions

Maximum 4.2 m high by:

  • Lowboy:  3.5 m width (min 0.9 m ground clearance)
  • Gooseneck / drop trailer:  2.6 m width (no overhang)
  • No overweight loads allowed. 
  • Speed Limit: 15 km/h
  • Two lane traffic (occasionally part of a lane may be occupied during construction)
  • Expect short delays due to construction activity.
  • Flag persons will control traffic when required.
  • Emergency vehicles will be accommodated first at all times.

Commercial Vehicles Restrictions

  • Maximum 5.0 m high
  • Overweight loads by permit.
  • Speed Limit: 15 km/h
  • Single lane traffic
  • Expect delays up to 30 minutes due to construction activity
  • Emergency vehicles will be accommodated first at all times

Commercial Vehicles Restrictions

Maximum 4.2 m high by:

  • Lowboy:  3.5 m width (min 0.9 m ground clearance)
  • Gooseneck / drop trailer:  2.6 m width (no overhang)
  • No overweight loads allowed. 

ADDITIONAL INFORMATION:

Please verify that your vehicle configuration conforms with the loading allowed under the registration documents and to the “Large Vehicle Control Regulations” available here.

Any changes to the Allowable Legal Axle Weight Percentages will be announced 48 hours in advance by the Department on the Public Highway Information Service available toll free at: 1-800-661-0750.