Where Is the Biggest Blind Spot on a Semi Truck?

A semi truck has many blind spots, but the biggest blind spot on a semi truck is directly behind the cab. This area is commonly referred to as the “No Zone” because of its lack of visibility for the driver.

The No Zone is located directly behind and beside the cab, extending outwards at least 20 feet in each direction. This means that a car or other vehicle could be sitting in this blind spot without the driver of the semi being able to see them. This can be extremely dangerous for both drivers, as it increases the chances of an accident.

The best way to avoid blind spots on a semi truck is by driving defensively and being aware of where your vehicle is in relation to other vehicles. It’s important to maintain a safe distance when driving near large trucks and always make sure that you can see the driver in their side mirror before attempting to pass them. Additionally, drivers should avoid lingering in any No Zone areas, as they may not be visible to the semi driver.

Other Blind Spots on Semi Trucks

In addition to the No Zone directly behind and beside the cab, there are also several other blind spots on a semi truck that drivers should be aware of. These include areas just ahead of the cab on either side, as well as an area that extends from just below the cab outwards towards both sides of the trailer.

Tips for Seeing Semi Truck Blind Spots

Despite their size and presence on roads, it’s possible for drivers to reduce their risk by taking measures such as:

  • Checking all mirrors before passing or changing lanes.
  • Leaving extra space between vehicles when driving near large trucks.
  • Slowing down when approaching intersections or merging onto highways.
  • Being sure that you can see both sides of a semi when passing it.

By following these simple tips and being aware of potential blind spots on a semi truck, drivers can help reduce their risk while sharing roads with large trucks.

In conclusion, while there are numerous blind spots on a semi truck, one of its biggest blind spots is located directly behind and beside its cab – commonly referred to as “the No Zone” – extending outward at least 20 feet in each direction. Drivers should always drive defensively when sharing roads with large trucks and be sure to check all mirrors before changing lanes or passing them. By following these simple tips and being aware of potential blind spots on a semi truck, drivers can help reduce their risk while sharing roads with large trucks .

Where Is The Biggest Blind Spot On A Semi Truck?


The biggest blind spot on a semi truck is located directly behind and beside its cab – commonly referred to as “the No Zone” – extending outward at least 20 feet in each direction.

Photo of author

Susan Delgado