The length and width of the skirts help reduce the aerodynamic drag caused by air turbulence when the truck is moving. Read more: The 15 Most Reliable Pickup Trucks Of All Time, Ranked For semi ...

In the U.S., the standard width for a semi-trailer is 8.5 feet ... In addition to the documents semi-truck drivers must have, extra-wide haulers require a special permit and may sometimes ...

The length and width of the skirts help reduce the aerodynamic drag caused by air turbulence when the truck is moving. For semi-truck drivers and owners, understanding how aerodynamics affects ...