Collisions between motor vehicles and moose are an increasing public health hazard in many countries, according to a study by doctors at a Swedish university.

Sweden, for example. One-third of all accidents on state roads in Sweden involve col- lisions with large wildlife, such as moose, said the researchers, who are all physicians at the University of Umea in Sweden.

Collisions between cars and moose increased five-fold during the 1970s, the researchers calculated, and one in every 10 Swedes who drive more than 12,500 miles a year will collide with a moose during their lifetime.

"The mechanism of a moose collision is special," they said, "since the body of the moose, because of its long legs, will strike directly against the windshield pillars, the windshield and the front roof of passenger cars."

The findings, based on police reports and hospital records for 650 moose-car collisions during 1979-80, were reported in the American Journal of Public Health in an article called "Collisions Between Passenger Cars and Moose, Sweden." The researchers recommend a strengthening of the windshield pillars and front roof and use of "antilacerative" windshields with an inner layer of plastic to protect occupants from glass splinters in case of a crash.