A truck bypass is a roadway that provides physical separation of

truck A truck or lorry is a motor vehicle designed to transport freight, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame construct ...

s from passenger vehicles at a

freeway A controlled-access highway is a type of highway that has been designed for high-speed vehicular traffic, with all traffic flow—ingress and egress—regulated. Common English terms are freeway, motorway, and expressway. Other similar terms ...

interchange Interchange may refer to: Transport * Interchange (road), a collection of ramps, exits, and entrances between two or more highways * Interchange (freight rail), the transfer of freight cars between railroad companies * Interchange station, a rai ...

in order to eliminate

weaving Weaving is a method of textile production in which two distinct sets of yarns or threads are interlaced at right angles to form a fabric or cloth. Other methods are knitting, crocheting, felting, and braiding or plaiting. The longitudinal ...

between passenger cars traveling at higher speeds and trucks traveling at lower speeds. Typically a truck bypass exits the main freeway some distance before the interchange it is intended to bypass; trucks are usually required to use the bypass, while passenger cars may choose between the bypass and the main traffic lanes. A truck bypass may take the form of a dedicated roadway or a collector/distributor road. The bypass allows vehicles traveling on it to exit the interchange in the same possible directions as the main line of traffic, and then merges with the respective freeway at some point past the interchange. ''Truck bypass'' should not be confused with ''

truck lane In road transport, a lane is part of a roadway that is designated to be used by a single line of vehicles to control and guide drivers and reduce traffic conflicts. Most public roads (highways) have at least two lanes, one for traffic in eac ...

''; a truck lane is a lane dedicated for trucks on steep inclines that is not physically separated from the main highway.

Notable examples

United States

California

Interstate 5 Interstate 5 (I-5) is the main north–south Interstate Highway System, Interstate Highway on the West Coast of the United States, running largely parallel to the Pacific coast of the contiguous U.S. from Mexico to Canada. It travels thro ...

with four locations **Southern terminus of Interstate 405 (

El Toro Y The El Toro "Y" is a freeway interchange in Irvine, California where the Santa Ana Freeway, Interstate 5 (I-5), and the San Diego Freeway (at that point the I-405) merge. South of the El Toro Y, the highway is named the " San Diego Fr ...

interchange) in Irvine **Northern terminus of Interstate 405 near San Fernando **A truck route from the western terminus of I-210 to the southern terminus of SR 14 at the

Newhall Pass Interchange The Newhall Pass interchange, officially the Clarence Wayne Dean Memorial Interchange, is a highway interchange at Newhall Pass in Southern California, United States. It is south of the city of Santa Clarita and north of the Los Angeles neighbo ...

. Trucks traveling on I-5 are separated from passenger cars onto a dedicated roadway to the east– the original

U.S. Route 99 U.S. Route 99 (US 99) was a main north–south United States Numbered Highway on the West Coast of the United States until 1964, running from Calexico, California, on the Mexican border to Blaine, Washington, on the Canadian border. It w ...

over which I-5 was built. **Southern terminus of SR 99 (southbound only) at the

Wheeler Ridge Interchange The Wheeler Ridge Interchange is a freeway interchange near Wheeler Ridge, California, where State Route 99 (SR 99) merges with Interstate 5 (I-5). Located approximately south of Bakersfield, it is the southernmost freeway inte ...

near Wheeler Ridge *

Interstate 15 Interstate 15 (I-15) is a major Interstate Highway in the Western United States, running through Southern California and the Intermountain West. I-15 begins near the Mexican border in San Diego County and stretches north to Alberta, Ca ...

at the northern terminus of I-215 near San Bernardino * Interstate 215 (southbound only) at the south end of its overlap with SR 60 in Riverside * Interstate 580 (westbound only) at the western terminus of I-205 near Livermore

Georgia

Commercial Vehicle Lane Project on

Interstate 75 Interstate 75 (I-75) is a major north–south Interstate Highway in the Great Lakes and Southeastern regions of the United States. As with most Interstates that end in 5, it is a major cross-country, north–south route, traveling from S ...

from

I-475 Interstate 475 may refer to: * Interstate 475 (Georgia), a bypass of Macon, Georgia * Interstate 475 (Michigan) Interstate 475 (I-475) is a north–south List of auxiliary Interstate Highways, auxiliary Interstate Highway in the US state o ...

north of Macon to SR 20 near McDonough (construction to begin in 2024 with a 2028 completion date)

New Jersey

New Jersey Turnpike The New Jersey Turnpike (NJTP) is a system of controlled-access highway, controlled-access toll roads in the U.S. state of New Jersey. The turnpike is maintained by the New Jersey Turnpike Authority (NJTA).The Garden State Parkway, although ma ...

, a toll road with a continuous car and truck split.

Oregon

(northbound only) after exit #294 to Barbur Boulevard (northern terminus of

OR 99W Oregon Route 99W is a state-numbered route in Oregon, United States, that runs from OR 99 and OR 99E in Junction City north to I-5 in southwestern Portland. Some signage continues it north to US 26 near downtown, but most signage agrees wit ...

) in Portland

References

{{Road types Road infrastructure Road junction types Types of roads Limited-access roads