Summary of U.S. DOT Radiation Limits

MEASURING POINT

RATE LIMIT

Exclusive Use Vehicles

Two meters (6.6') from sides-enclosed trailer

.1 mSv/hr (10 mrem/hr)

Two meters (6.6') from vertical plane of trailer edge (flatbed)

.1 mSv/hr (10 mrem/hr)

At contact on surface of side and top-enclosed trailer

2 mSv/hr (200 mrem/hr)

At contact on any surface of load (flatbed)

2 mSv/hr (200 mrem/hr)

On vertical plane of trailer edge (flatbed)

2 mSv/hr (200 mrem/hr)

Surface of bottom of trailer

2 mSv/hr (200 mrem/hr)

Package surface (enclosed trailer only)

10 mSv/hr (1000 mrem/hr)

Occupied area of vehicle

.02 mSv/hr (2 mrem/hr)

Non-Exclusive Use Vehicles

One meter (3.3') from any surface of package

.1 mSv/hr (10 mrem/hr)

Package surface

2 mSv/hr (200 mrem/hr)