Moose are active throughout the day, but more so during the hours of dawn and dusk. They are able to run at speeds up to 35 miles per hour. Moose are not ordinarily aggressive but they can be stubborn, and may become aggressive when hungry, tired, or harassed by people or traffic. I once pulled my car over to take a picture of a moose that had stepped out of the tree line and appeared about to cross the road. When I opened my car door and began sliding out, the moose ran at my car, causing me to abandon my idea of taking his picture. Another time, my wife and I had to stop our car late at night on Route 11, between Brownville and Millinocket, Maine, while at least five moose were milling about the road. Moose are not naturally aggressive, but neither are they particularly afraid of you or your car.