The device, so sensitive it can detect a rolling golf ball, will monitor an exit to make sure no one slips in.
The company's board approves a $1 million bonus that amounts to $185 for each employee hired before February.
As do investors waiting for clarity on bond-buying and who will fill vacancies.
Legal costs could leave the Montreal, Maine and Atlantic Railway no funds for compensating victims.
The automated system, to be installed in Brunswick, is aimed at preventing fatalities in high-risk areas.