ABATE
variously, A Brotherhood Against Totalitarian Enactments
American Bikers Against Totalitarian Enactments
A Brotherhood Aimed Towards Education
American Bikers for Awareness, Training & Education
American Bikers Aimed Towards Education
American Bikers Advocating Training & Education
per Wikipedia
ABS
antilock braking system
AMA
American Motorcyclist Association
ATGATT
all the gear all the time
BAC
blood alcohol content/concentration
BRO
bikers' rights organization
CDC
Centers for Disease Control
CMISST
Center for the Management of Information
for Safe and Sustainable Transportation
CODES
Crash Outcome Data Evaluation System
CY
[Motor]cycle endorsement MI driver license
DRL
daytime running lights
DVCIC
Deer-Vehicle Crash Information Clearinghouse
DVCIR
Deer-Vehicle Crash Information and Research
eSUM
European Safer Urban Motorcycling
EuroRAP
European Road Assessment Programme
FAQ
frequently asked question
FARS
Fatality Analysis Reporting System
FMCSA
Federal Motor Carrier Safety Administration
Federal Motor Carrier Safety Association
FMVSS
Federal Motor Vehicle Safety Standard
GAO
Government Accountability Office
GHSA
Governors Highway Safety Association
GWRRA
Gold Wing Road Riders Association
HLDI
Highway Loss Data Institute
HPRL
Head Protection Research Laboratory
IIHS
Insurance Institute for Highway Safety
MAG
Motorcycle Action Group
MAIDS
Motorcycle Accidents In Depth Study
MCCA
Michigan Catastrophic Claims Association
MCCS
Motorcycle Crash Causation Study
MDTSEA
Michigan Driver & Traffic Safety Education Association
MIC
Motorcycle Industry Council
MMWR
Morbidity and Mortality Weekly Report
MSF
Motorcycle Safety Foundation
NAMS
National Agenda for Motorcycle Safety
NCSL
National Council of State Legislatures
NETS
Network of Employers for Traffic Safety
NHTSA
National Highway Transportation Safety Administration
NOPUS
National Occupant Protection Survey
NTSB
National Transportation Safety Board
OHSP
Office of Highway Safety Planning
OTS
On The Spot UK road-accident study
RCT
RiderCoach Trainer
RETS
Rider Education and Training System
ROWV or ROWVs
right-of-way violation(s)
RSS
Riding and Street Skills
SMARTER
Skilled Motorcyclist Association –
Responsible, Trained and Educated Riders
SMIDSY
Sorry, mate/man/motorcyclist, I didn't see you.
SMRO
state motorcyclists' rights organization
SMSA
State Motorcycle Safety Administrators,
  National Association of
SOS
Secretary of State
UMTRI
University of Michigan Transportation Research Institute
U.S. DOT
United States Department of Transportation
WHO
World Health Organization
WSU-TRG
Wayne State University-Transportation Research Group