Cumulative dose to members of the public from routine highway transportation of RAM

The annual maximum individual in-transit dose from radioactive materials transport in the United States has been estimated by a simple statistical method. The national-level annual dose estimate obtained with this method (9.0E-05 mrem or 0.9 pSv) is low in comparison to that of a previous analysis that, although based on the same shipment data, modeled the maximum in-transit individual as being exposed to every shipment. All estimates of maximum individual in-transit dose are well below the Negligible Individual Dose, however, and one can conclude that transportation background dose to a member of one off-link population from radioactive materials transportation is not significant. Route-specific estimates could be made if detailed shipment routing data were available