| AADT |
annual average daily traffic |
| ATDM |
active traffic demand management |
| ATM |
active traffic management |
| CMF |
crash modification factors |
| CMP |
congestion management process (Federal guidelines) or Congestion Management Program (locally or regionally adopted) |
| CMM |
Capability Maturity Model |
| ConOps |
concept of operations |
| d/c |
demand-to-capacity (ratio) |
| DOT |
department of transportation |
| DSF |
decision support framework |
| D-PTSU |
dynamic part-time shoulder use |
| ER |
emergency responders |
| FFS |
free flow speed |
| FSP |
freeway service patrol |
| FHP |
Florida Highway Patrol |
| FHWA |
Federal Highway Administration |
| FI |
fatal and injury |
| GPS |
Global Positioning System |
| GIS |
geographic information systems |
| HCM |
Highway Capacity Manual |
| HOT |
high occupancy toll |
| HOV |
high occupancy vehicle |
| ITS |
intelligent transportation systems |
| LOS |
level of service |
| MDOT |
Michigan Department of Transportation |
| mi/h |
miles per hour |
| MPO |
metropolitan planning organization |
| MTP |
metropolitan transportation plan |
| MUTCD |
Manual on Uniform Traffic Control Devices |
| NHS |
National Highway System |
| NPMRDS |
National Performance Management Research Data Set |
| PCE |
passenger car equivalent |
| pc/h |
passenger cars per hour |
| pc/h/ln |
passenger cars per hour per lane |
| PDO |
property damage only |
| PeMS |
(California's) Performance Measurement System |
| PBPD |
performance-based practical design |
| PBPP |
performance-based planning and programming |
| PLM |
product limit method |
| PTI |
planning time index |
| PTSU |
part-time shoulder use |
| SHRP 2 |
Second Strategic Highway Research Program |
| SOV |
single occupant vehicle |
| SPF |
safety performance function |
| S-PTSU |
static part-time shoulder use |
| TIP |
transportation improvement program |
| TOPS-BC |
Tool for Operations Benefit-Cost |
| TMA |
transportation management area |
| TMC |
transportation management center |
| TSMO |
transportation systems management and operations |
| TTI |
travel time index |
| V/C |
volume to capacity ratio |
| VHD |
vehicle hours delay |
| VHT |
vehicle hours traveled |
| VMT |
vehicle miles traveled |
| veh/h/ln |
vehicles per hour per lane |
| WSDOT |
Washington State Department of Transportation |
