The state Department of Fish and Game says that moose aren't normally aggressive but they can turn so in winter when they are hungry, tired of walking in deep snow or are being harassed by dogs, people or traffic.
The department offers some moose safety tips on its Web site: If a moose is blocking your way, be patient and wait it out, or try to go another way. If a moose charges, run away because moose usually won't chase you very far, unlike with bears or dogs. Try to get behind something solid -- you can run faster around a tree than a moose. If you end up on the ground, curl into a ball, protect your head with your hands and hold still. Don't move until the moose is a safe distance away.