Appendix B — Acronyms and Glossary

Table B.1: Commonly used acronyms
Acronym Definition
ADA Americans with Disabilities Act
BEV Battery Electric Vehicle
BRT Bus Rapid Transit
CAV Connected and Automated Vehicles
CMAQ Congestion Mitigation and Air Quality
CSAH County State Aid Highway
CTS Center for Transportation Studies
EPA Environmental Protection Agency
EPA Environmental Protection Agency
FAA Federal Aviation Administration
FAST Act Fixing America’s Surface Transportation Act
FHWA Federal Highway Administration
FTA Federal Transit Administration
GDP Gross Domestic Product
HOV High Occupancy Vehicle
HSIP Highway Safety Improvement Program
LRT Light Rail Transit
MAC Metropolitan Airports Commission
MPCA Minnesota Pollution Control Agency
MPO Metropolitan Planning Organization
MTS Metropolitan Transportation Services
MnDOT Minnesota Department of Transportation
NAICS North American Industry Classification System
NHS National Highway System
NTD National Transit Database
PCI Pavement Condition Index
PHED Peak Hour Excessive Delay
PHEV Plug-in Hybrid Electric Vehicle
RBTN Regional Bicycle Transportation Network
TAB Transportation Advisory Board
TAC Technical Advisory Committee to the TAB
TBI Travel Behavior Inventory
TOD Transit Oriented Development
TTI Texas Transportation Institute
VRM Vehicle Revenue Miles
Table B.2: Glossary
Term Definition
Annual Average Daily Traffic (AADT) The roadway estimates of total vehicles on a road segment on any given day of the year (all directions of travel). This represents the total number of vehicles per year divided by 365 and is developed using factors to adjust for season, day of the week, and vehicle type.
Bicycle Level of Traffic Stress Developed by the University of Minnesota Accessibility Observatory, the Bicycle Level of Traffic Stress (LTS) evaluation is a method for classifying street segments’ suitability for bicycling based on the physical characteristics of the roadway, such as speed limits, lane configurations, and the types of bicycle facilities present, if any. A value of 1 (lowest stress) to 4 (highest stress) is assigned to each street segment based on these characteristics. In this study, roadway characteristics are determined by street segment tag data in the OpenStreetMap network data used for routing computations. We define the LTS 1 network as 'lowest-stress', LTS 2 network as 'low-stress', the LTS 3 network as 'medium-stress', and the LTS 4 network as the 'open streets' network — i.e. if a person feels comfortable riding a bicycle on all streets (except limited-access highways, such as interstates and freeways), including arterials, they would experience 'open streets' access.
Heavy Commercial Annual Average Daily Traffic (HCAADT) The roadway estimates of heavy commercial vehicles along a specific segment of roadway (all directions of travel) on any day of the year. This estimate represents the total number of heavy commercial vehicles per year, divided by 365, and includes factors adjusting for seasons.
High Frequency Transit Network Stops served by routes that depart every 15 minutes or better, with at least three stops per hour, on weekdays from 6:00 AM to 7:00 PM and Saturdays from 9:00 AM to 6:00 PM within the Twin Cities Metropolitan area
Real GDP Real gross domestic product is an inflation-adjusted measure of each area's gross product that is based on national prices for the goods and services produced within the area.
Travel Time Index The Travel Time Index measures the proportion of additional time that a trip takes due to congestion. A Travel Time Index of 1.30 indicates that it takes 30 percent longer to make a trip in the peak period (6 to 10 a.m. and 3 to 7 p.m.) than in off-peak conditions, when the motorist could travel at free-flow speeds.

B.1 Additional resources

B.1.1 MnDOT Transportation Data and Analysis (TDA) Glossary

MnDOT maintains a glossary of transportation terms. The glossary can be found on the MnDOT website.

B.1.2 Transit

The Federal Transit Administration (FTA) National Transit Database (NTD) maintains a comprehensive glossary of transit terms and measures. The glossary can be found on the NTD website.

B.1.3 Safety

The National Highway Transit Safety Administration (NHTSA) operates the Fatality Analysis Reporting System (FARS), a nationwide census providing NHTSA, Congress and the American public yearly data regarding fatal injuries suffered in motor vehicle traffic crashes. Data in this report was downloaded directly from the FTP site. Learn more on the NHTSA website.

B.1.4 Environment and Climate

Environmental Protection Agency (EPA) National Ambient Air Quality Standards (NAAQS) are kept up to date on the EPA website.

The Minnesota Pollution Control Agency (MPCA) produces an annual report, “The air we breathe: The state of Minnesota’s air quality”. The report is available on the MPCA website.