The old Hanover Branch railbed still cuts across town, and on a February night the snow lying on it turns blue under the lights at the crossings. Mass Lawn Pros is out in those hours — plow down, driveways opened, walks cleared, salt laid where the ice means to set. Come May the same trucks trade blades for mowers and the week fills with lawns instead of storms. Both jobs answer to one question, which is how a place looks the moment the crew pulls away. Mass Lawn Pros covers Hanover and the towns that touch it.