Idaho (ID) DOT COMPLIANCE
ITD JURISDICTION
Substation Power Transformers Oversize Permits in Idaho (2026)
Comprehensive carrier guide for transporting Substation Power Transformers across Idaho. Review official ITD single-trip fees, escort trigger dimensions, curfew hours, and superload bridge thresholds.
⚡ Direct Compliance Summary (Idaho DOT)
In Idaho, single-trip oversize/overweight permits for Substation Power Transformers average $28.00 base under ITD jurisdiction. A front pilot car is legally mandated on two-lane highways when load width reaches 12'6" (and 14'6" on 4-lane interstates). Loads exceeding 16'0" require a certified lead escort with a calibrated height pole.
Single-Trip Permit Fee
$28.00
Issued by ITD
2-Lane Escort Trigger
12'6"
4-Lane Trigger: 14'6"
Height Pole Clearance
16'0"
Mandatory Lead Escort
Superload Threshold
200,000 lbs
Police Escort / Bridge Review
⚖️ Federal Bridge Formula B Quick Calculator (Idaho Interstate Corridors)
Estimate your allowable gross vehicle weight under Federal Bridge Formula B: W = 500 [LN/(N-1) + 12N + 36].
🚦 Idaho Travel Curfews & Operational Restrictions
Metropolitan Rush-Hour Curfews: Boise area peak traffic curfews
Weekend Travel: Weekend travel allowed on designated routes
Safety Equipment: Utility bucket truck escort to lift low power lines, pre-cleared bridge crossing slow-down orders.
🗺️ Continuous Interstate Corridor: Bordering States for Substation Power Transformers
Hauling across state lines? Check escort triggers and permit rates in states directly bordering Idaho: