Route Capacity Significant MPs (0)
Railroad Crossing (1)
Designated Route up to 129K lbs (4)
| Designated routes for combinations < 115 feet long including overhang. Maximum off-tracking not to exceed 6.5 feet.; 5 |
| Designated routes for combinations < 95 feet long including overhang. Maximum off-tracking not to exceed 5.5 feet. |
| Non-Designated Routes. Use Extra Length Map for operating instructions. |
Extra Length Route (5)
| National network routes legal to operate a single trailer not exceeding 53 ft and double trailers not exceeding 68 ft (tip to tail). |
| National network routes legal to operate a single trailer not exceeding 53 ft and double trailers not exceeding 68 ft (tip to tail). |
| Routes Legal For A Single Trailer Not Exceeding 48 Feet And A Doubles Configuration Not Exceeding 61 Feet And 75 Feet Overall (Doubles Configurations Can Exceed One Or The Other And Still Be Legal). Extra Length Permit Required If Exceeding These Dimensions And Must Not Exceed 3.00 Feet Of Off-Track And 85 Feet Overall Length Including Load Overhang. |
| Routes Legal For A Single Trailer Not Exceeding 48 Feet And A Doubles Configuration Not Exceeding 61 Feet Of Trailers And 75 Feet Overall (Doubles Configurations Can Exceed One Or The Other And Still Be Legal). Extra Length Permit Required If Exceeding These Dimensions And Must Not Exceed 5.50 Feet Of Off-Track And 95 Feet Overall Length Including Load Overhang |
| Routes legal for a single trailer not exceeding 53 ft and a doubles configuration not exceeding 61 ft of trailers and 75 ft overall. |
Route Capacity (3)
| Posted Bridges |
| Single Axle = 22,500 lbs; Two-Axle Tandem = 38,000 lbs; Three-Axle Tridem = 48,000 lbs |
| Single Axle = 24,000 lbs; Two-Axle Tandem = 41,000 lbs; Three-Axle Tridem = 51,500 lbs |
| Single Axle = 25,500 lbs; Two-Axle Tandem = 43,500 lbs; Three-Axle Tridem = 54,500 lbs |
| Single Axle = 27,000 lbs; Two-Axle Tandem = 46,000 lbs; Three-Axle Tridem = 57,500 lbs |
| Single Axle = 30,000 lbs; Two-Axle Tandem = 51,500 lbs; Three-Axle Tridem = 64,500 lbs |
| Single Axle = 33,000 lbs; Two-Axle Tandem = 56,000 lbs; Three-Axle Tridem = 70,500 lbs |
Speed Zone MPH (2)
| 20 |
| 25 |
| 30 |
| 35 |
| 40 |
| 45 |
| 50 |
| 55 |
| 60 |
| 65 |
| 70 |
| 75 |
| 80 |
Designated Routes 129K Active Applications (16)
Vertical Clearance (18)
| 15 Feet 1 Inch to 15 Feet 6 Inches |
| 14 Feet 1 Inch to 15 Feet |
| 14 Feet or Less |
Critical Rural Freight Corridors (6)
Critical Urban Freight Corridors (7)
Highway Tier (8)
| Interstate |
| Expressway |
| State |
| Regional |
| District |
Scenic Byway (9)
Federal Aid Route (10)
| FAI--2 Lane Interstate and FAI--Federal Aid Interstate |
| STP--Non-NHS Principal Arterials |
| STC--All Collectors-No Minor |
| NHC--National Highway Collectors |
| NHM--National Highway Minor Arterials |
| NHS--All Principal Arterials |
| SMA--All Minor Arterials |
ITD Functional Class Road (11)
| Interstate |
| Other Freeways or Expressways |
| Other Principal Arterials |
| Minor Arterial |
| Major Collector |
| Minor Collector |
State Highway (12)
| Interstate |
| US Highway |
| State Highway |
All Idaho Road (13)
| Road |
Rail Road (14)
|
