Transportation

Load Allowances

Updated on March 27, 2017.

1. SEASONAL LOAD ALLOWANCES 
2. SPECIAL ADVISORY: Buffalo River Bridge (Revised)
3. SPECIAL ADVISORY: Frank Channel Bridge (Revised)

1. 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


2. SPECIAL ADVISORY:Buffalo River Bridge - Revised

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

During construction from April 3rd to October 31th 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 2, 2017 April 3, 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 3.1 meters wide, 4.2 meters high allowed)
  • Lanes will be alternating
  • No wide loads will be allowed
  • No overweight loads allowed

3. SPECIAL ADVISORY:Frank Channel Bridge - Revised

The Department of Transportation is currently contemplating various options for upgrading the Frank Channel Bridge in order to meet current and projected traffic loads.

At this point in time we do not envision any major restrictions on the bridge for 2017. The current legal weight and dimension limits remain in effect.

Department will advise all carriers and the public of any restrictions well in advance.

For more information: Call the “On-line Services” helpline at 1-866-225-3505 Monday to Friday, 9:00 a.m. to 4:00 p.m., or leave a message, or visit our website www.dot.gov.nt.ca/Highways/Allowances.

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.