Idaho permits
Idaho Oversize Permit Rules
Route surveys, height poles, legal limits, escorts, Boise valley curfews, travel hours and holidays for oversize and overweight loads in Idaho, each checked against ITD and the Idaho Administrative Code.
Last checked: Oct 5, 2026
This page is general information only, not legal advice and not a permit. Rules change often and each state's permit and official rules are the final word. Always confirm limits, escorts, routes and travel times with the state permit office before moving a load. Reliable Transport LLC is not responsible for decisions made using this information.
- Height pole
- Over 16'H
- Escorts start
- Over 12'W on black routes
- Legal size
- 8'6"W, 14'H
Hauling through other states? Use our permit map and route planner
Open the route plannerITD permits
How Idaho sizes up a heavy load
The Idaho Transportation Department (ITD) Commercial Vehicle Services issues special permits under IDAPA 39.03.01 and Idaho Code Title 49 chapter 10. These are the numbers we plan every Idaho load with. Run your exact load and route through our permit tool to see every state on the trip.
Check your load
Enter your width, height, length and weight in our permit tool to see the Idaho rules and every other state on your route, each with its official source.
Idaho limits
Idaho legal limits and permit thresholds
Over any legal limit, the load needs an ITD special permit before it moves.
Idaho legal size, weight and permits
Official sources linked| Rule | Limit |
|---|---|
| Route survey | ITD publishes no size trigger for a route survey in IDAPA 39.03.01 or on the pilot escort map (IDAPA 39.03.01, Rules Governing Special Permits, ITD Pilot/Escort Vehicle Travel Requirements and Vertical Clearance of Structures map (Jan 8, 2025)) |
| Height pole | Over 16'H, the lead pilot vehicle deploys a non metallic height pole (IDAPA 39.03.01, Rules Governing Special Permits, ITD Pilot/Escort Vehicle Travel Requirements and Vertical Clearance of Structures map (Jan 8, 2025)) |
| Legal width | 8'6"W (Idaho Code Title 49 chapter 10, IDAPA 39.03.01, Rules Governing Special Permits) |
| Legal height | 14'H (Idaho Code Title 49 chapter 10, IDAPA 39.03.01, Rules Governing Special Permits) |
| Legal weight | 80,000 lbs on the Interstate; higher by the axle table on other highways (Idaho Code Title 49 chapter 10, IDAPA 39.03.01, Rules Governing Special Permits) |
Escorts
Idaho escort requirements
Idaho sets escorts by the ITD pilot escort map route colors (red, black, white) and by height.
Idaho escorts by load size
Official sources linkedEscort rules come from the ITD pilot escort map and IDAPA 39.03.01. Red route width rows we could not confirm twice are left off this page; the permit sets those. (ITD Pilot/Escort Vehicle Travel Requirements and Vertical Clearance of Structures map (Jan 8, 2025), IDAPA 39.03.01, Rules Governing Special Permits)
Height and routes
Route surveys, tall loads and special permits
What Idaho asks of the tallest loads.
Route survey
No published size trigger in IDAPA 39.03.01 or on the ITD pilot escort map. (IDAPA 39.03.01, Rules Governing Special Permits, ITD Pilot/Escort Vehicle Travel Requirements and Vertical Clearance of Structures map (Jan 8, 2025))
Height pole
Over 16'H, a non metallic height pole on the lead pilot vehicle. (IDAPA 39.03.01, Rules Governing Special Permits, ITD Pilot/Escort Vehicle Travel Requirements and Vertical Clearance of Structures map (Jan 8, 2025))
Travel times
Travel hours, nights, weekends and holidays
When a permitted load may move in Idaho.
Hours
Red coded routes: daylight only, until 2 p.m. Friday or the day before a holiday, no Saturday or Sunday. Black coded routes and Interstate: up to 12'W, 120'L and 15'H may move 24 hours a day. (ITD Pilot/Escort Vehicle Travel Requirements and Vertical Clearance of Structures map (Jan 8, 2025), IDAPA 39.03.01, Rules Governing Special Permits)
City curfews
Over 13'W: no travel 6 a.m. to 9 a.m. or 4 p.m. to 6:30 p.m., Monday through Friday, in the Boise valley, Coeur d'Alene, Idaho Falls, Pocatello, Twin Falls and the other listed cities. (ITD Pilot/Escort Vehicle Travel Requirements and Vertical Clearance of Structures map (Jan 8, 2025), IDAPA 39.03.01, Rules Governing Special Permits)
Holidays
New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas. Red routes stop at 2 p.m. the day before; on black routes loads over 12'W, 120'L or 15'H stop at 4 p.m. the day before. (ITD Pilot/Escort Vehicle Travel Requirements and Vertical Clearance of Structures map (Jan 8, 2025), IDAPA 39.03.01, Rules Governing Special Permits)
Superloads
Idaho special permits
Idaho has no separate superload class in IDAPA 39.03.01. Loads past the pilot escort map (over 18'W, or red routes past the table) are set by the permit. (ITD Pilot/Escort Vehicle Travel Requirements and Vertical Clearance of Structures map (Jan 8, 2025), IDAPA 39.03.01, Rules Governing Special Permits)
See how we plan the biggest loads on our Superload Transport page.
Our moves
Heavy loads we have moved
150,000 lb transformer
A 150,000 lb transformer from Pocatello, ID to Akron, OH.
Read the move →207,000 lb dryer drum
A 207,000 lb dryer drum from Louisville, KY to Richmond, VA.
Read the move →Moving a load in Idaho?
Send the dimensions and weight. We file the Idaho permit and book the escorts.
Request a quote →See every move on our Moves page.
Sources
Official Idaho sources
Every rule on this page is taken from the ITD pages and rule text below and confirmed by a second source. Rules we could not confirm twice are left off this page. Rules change, and the permit itself always decides. Last checked: Oct 5, 2026.
Questions
Idaho permit questions
Does Idaho require a route survey?
ITD publishes no size trigger for a route survey in IDAPA 39.03.01 or on the pilot escort map.
When does a tall Idaho load need a height pole?
Over 16'H, the lead pilot vehicle deploys a non metallic height pole.
What are the legal size limits in Idaho?
8'6"W and 14'H.
When does Idaho require escorts on black routes?
Over 12'W up to 14'W, one front pilot car. Over 14'W up to 18'W, front and rear.
Which holidays stop oversize loads in Idaho?
New Year's Day, Memorial Day, Independence Day, Labor Day, Thanksgiving and Christmas, with the day before windows on the pilot escort map.
Keep planning
More for your Idaho move
Permit rules in other states
Hauling through other states? Use our permit map and route planner
Open the route plannerReliable Transport LLC | Reliable Heavy Haul
Ready to move it?
We haul oversize and overweight loads across the USA and Canada from our home base at 7660 W Third St, Dayton, OH 45417. Send your load details and we will plan the Idaho permit, route and escorts.
This page is general information only, not legal advice and not a permit. Rules change often and each state's permit and official rules are the final word. Always confirm limits, escorts, routes and travel times with the state permit office before moving a load. Reliable Transport LLC is not responsible for decisions made using this information.