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| Dimension | National Network | State and Other Supplemental Highways |
| Width: | 8' 6" | 8' 6" |
| Height: | 13' 6" Auto transporter 14' | 13' 6" |
| Length: | National Network | State and Other Supplemental Highways |
| Bus | ||
| Articulated bus | ||
| Straight Trucks | ||
| Straight truck and trailer | ||
| Tractor-semitrailer combinations | No limit w/legal trailer | 100' unless otherwise limited. Such routes will be posted – except NHS routes |
| Semitrailer | 53' | 53' unless route is posted otherwise |
| Tractor-twin-trailer combination | No limit If 28' 6" trailers are used, maximum total length may not exceed 65' | No limit w/legal trailer If 28' 6" trailers are used, maximum total length may not exceed 67' 6" |
| Trailers of twin-trailer combinations | 28' | 28' |
| Boat-transporter combination | No limit With 48' trailer 65' limit with trailer over 58' | 65' tractor-trailer unit of 60' |
| Overhang limitations | front 3', rear 4' | |
| Stinger-steered boat-transporter | 75' | 75' |
| Overhang limitations | front 3', rear 4' | |
| Auto-transporter | No limit With 48' trailer 65' limit with trailer over 58' | 65' tractor-trailer unit of 60' |
| Overhang limitations | front 3', rear 4' | |
| Stinger-steered auto-transporter | 75' | 75' |
| Overhang limitations | front 3', rear 4' | |
| Saddlemount | 97' | 97' |
| General overhang limitations | ||
| Drawbar | ||
| Dromedary | ||
| Kingpin to rearaxle | ||
| Length special limitations or restrictions | On interstate and NHS routes, single-piece loads may be transported on an extendable semitrailer that exceeds 53', provided that no pieces will be loaded end to end and the semitrailer does not exceed 75' in length; on roads other than the interstate and NHS routes, the same rules apply, except that the overall length cannot exceed 100'. | |
| Weight: | Interstate and Defense Highways | State and Other Supplemental Highways |
| Steer axle | ||
| Single axle | 20,340 | 20,340 |
| Tandem axle | 34,000 Exception: If vehicle is less than 55' long and gross weight is less than 73,280 lb, will allow 40,680 lb | 37,340 40,680 semi-trailer tandems |
| Tridem axle | 61,020 | |
| Gross vehicle weight | 80,000 subject to federal bridge formula | 80,000 subject to state bridge formula |
| Load per inch width of tire | ||
| Per wheel | ||
| Tolerances | ||
| APU allowance | 550 | 550 |
| Natural gas allowance | ||
| Weight special limitations or restrictions | No lift axle may be used in computing allowable gross weight. On other state highways, certain commodity-specific tolerances apply. Contact Georgia Motor Carrier Compliance Division for more information. | |
On other state highways, certain commodity-specific tolerances apply. Contact Georgia Motor Carrier Compliance Division for more information.
Bridge rules
Georgia uses the federal bridge formula to determine maximum gross vehicle weight and maximum axle group weight limits on Georgia highways.
BRIDGE FORMULA
As noted above, some vehicles are subject to the bridge formula, shown below:
where W is the overall gross weight on any group of two or more consecutive axles (W = maximum allowed gross weight off the National Network) to the nearest 500 lb, L is the distance in feet between the extremes of any group of three or more consecutive axles, and N is the number of axles in the group under consideration; except that two consecutive sets of tandem axles may carry a gross load of 34,000 lb each providing the overall distance between the first and last axles of such consecutive sets of tandems is 36 ft or more.
L is the distance in feet between the first and last axles. This could include two axles that fall outside of the definition of a tandem. This applies to any group of axles on the Interstate, and gross weight only on non-interstate routes. (Exceptions: 3 or more axles on trailers may also be grouped together.)