1. Semi-Tractor and 53-Foot Trailer: A typical tractor-trailer combination consisting of a semi-tractor (also known as a semi) and a 53-foot trailer has an overall length of approximately 65 feet.
2. Double-Trailer Combinations: A tractor-trailer combination with two trailers, known as a double or twin trailer, can be longer. The overall length of a double-trailer combination can vary but is typically around 75 to 80 feet.
3. Triples: Some jurisdictions also allow "triples," which are tractor-trailer combinations with three trailers. Triples can have an overall length of around 90 to 100 feet.
4. Local Delivery/Pickup Trucks: Smaller tractor-trailer combinations used for local delivery or pickup may be shorter, with overall lengths ranging from 30 to 40 feet.
It's important to note that specific jurisdictions may have regulations and size limits for tractor-trailers, which can impact their overall length. These limits are set for safety considerations, including maneuverability, braking distance, and road capacity.