M
MAN – Metropolitan Area Network
MARS – Master Activity Reporting System
Max – Maximum
MC – Motor Carrier
MCREGIS -Specialized text retrieval system for Federal Safety regulations, operations manuals, rosters & data tables
MCRIS – FMCSA Information Systems Division
MCSAP – Motor Carrier Safety Assistance Program
MCSIP – Motor Carrier Safety Improvement Process (rating process)
MCMIS – Motor Carrier Management Information System
MCS – Motor Carrier Safety
MIME – Multipurpose Internet Mail Extension
Min – Minimum
Mod – Modified
MOP -Method of Payment
MP – Motor Property, Motor Passenger
MTU – Maximum Transmission (Transfer) Unit
MX – Mexico or Mexican