PORTLAND, Maine — Troopers are stepping up traffic enforcement over the Memorial Day weekend. But that’s not the only reason motorists across the region should slow down.

Spring’s arrival has sent moose onto roadways, causing a spate of crashes including one that killed a man on one of Maine’s busiest highways, Interstate 295. The problems are most acute at night, when the moose are active and their dark color makes them nearly invisible to motorists. Story continues..