Idaho CMV Compliance Guide
ID DOT regulations for commercial motor vehicles
ID State Police Commercial Vehicle SafetyOfficial ID DOT websiteOverview
Idaho State Police Commercial Vehicle Safety (CVS) section handles motor carrier enforcement. Idaho is a key freight corridor with I-84 connecting Boise to Oregon and I-90 crossing the northern panhandle. The state's agricultural economy generates significant seasonal truck traffic for produce and livestock.
Inspection & Enforcement Program
Idaho operates ports of entry on major highways and deploys mobile inspection units. The CVS section performs Level I through Level III inspections with particular attention to agricultural haulers during harvest season. Idaho participates in all national enforcement campaigns.
Weight Limits & Oversize/Overweight
Idaho allows up to 105,500 lbs GVW on certain designated routes for specific configurations (like triple trailers on I-84). Standard Interstate weight limits of 80,000 lbs apply otherwise. Idaho has a seasonal weight reduction (spring breakup) period on many state highways, typically March through May. The state issues annual overweight permits and has specific pilot/escort requirements for oversized loads.
Idaho-Specific Requirements
- Idaho allows 129,000 lb combinations on certain routes with proper permits and configurations.
- The state has seasonal (spring breakup) weight reductions on many state and local roads.
- Triple trailer combinations are legal on designated routes in Idaho (primarily I-84).
- Idaho enforces a state-specific excess weight permit system for agricultural products during harvest.
Contact
ISP Commercial Vehicle Safety: (208) 884-7220
Federal Requirements That Apply in Idaho
In addition to Idaho-specific regulations, all federal DOT and FMCSA requirements apply to commercial vehicles operating in ID. These guides cover each federal requirement in detail:
This information is provided as a general reference. State regulations change frequently. Always verify current requirements with the Idaho DOT or your compliance advisor before relying on any information presented here.