Boston's narrow streets, dense parking, and historical street layouts produce unique roadside challenges. Service trucks navigate tighter spaces than most metros. Some neighborhoods are essentially impassable for large recovery trucks.
Winter is hard. Snow events strand vehicles. Salt corrodes everything. Battery failures spike during the first hard freeze.
The Big Dig tunnel system has produced its own breakdown scenarios — vehicles overheating in long tunnels, fuel system issues at the elevation changes.
Beacon Hill, North End, and parts of Cambridge have streets that pre-date modern vehicles. Service is possible but takes longer.
Same flat rate across the Greater Boston area.