This website contains updated information only for those corridors actively in construction, the Southeast Rail Extension and North Metro Rail. All other content on this website is meant for historical purposes only and may not be up-to-date. Please visit RTD-Denver.com for the latest information about RTD.
AASHTO - American Association of State Highway and Transportation Officials
ABA - American Bus Association
ACT - Association for Commuter Transportation
A/E - Architect/Engineer
APTA - American Public Transportation Association
AQCC - Air Quality Control Commission
Articulated Vehicles - Extended length transit vehicles that "bend in the middle" for easier turning movements and increase capacity by 50-70 percent without additional vehicle operators.
As-Built - A certified copy of a drawing from a finalized project as it actually was built, including all amendments.
BNSF - Burlington Northern Santa Fe Railway Company
BRT - Bus Rapid Transit - A transit mode that combines the quality of rail transit and the flexibility of buses. It can operate on bus lanes, HOV lanes, expressways, or ordinary streets. The vehicles are designed to allow rapid passenger loading and unloading, with more doors than ordinary buses.
CASTA - Colorado Association of State Transit Agencies
Catenary - Suspended overhead wire, which carries high voltage for electrically powered transit vehicles (e.g. trolley coaches, light rail transit vehicles) from a central power source.
CCD - City and County of Denver
CDOT - Colorado Department of Transportation
CDPHE - Colorado Department of Public Health and Environment
CIP - Capital Improvement Program - A schedule of planned capital expenditures during a specified period of time.
CML - Consolidated Main Line - A segment of railroad track
CMP - Configuration Management Plan
Commuter Rail - Commuter rail is a transit mode that is a multiple car electric or diesel propelled train. It is typically used for local, longer-distance travel between a central city and adjacent suburbs, and can operate alongside existing freight or passenger rail lines or in exclusive rights of way.
COMTO - Conference of Minority Transportation Officials - An organization to foster unity and equal rights for minority groups in the transit industry.
CTN - Colorado Transportation Network
DBE/WBE - Disadvantaged / Women owned Business Enterprise
DEIS - Draft Environmental Impact Statement - The DEIS is the document that details the results of the detailed analysis of all of the projects alternatives. The DEIS contains all information learned about the impacts of a project and alternatives.
DMU - Diesel Multiple Unit - Diesel powered commuter rail trains.
DRCOG - Denver Regional Council of Governments
DUS - Denver Union Station
DUT - Denver Union Terminal
EA - Environmental Assessment - A report subject to the requirements of the National Environmental Policy Act (NEPA) demonstrating that an Environmental Impact Statement (EIS) is not needed for a specific set of actions. The EA can lead to a Finding of No Significant Impact (FONSI).
EIS - Environmental Impact Statement - An EIS is required by the Federal government under NEPA (see NEPA) for certain federal actions. An EIS is an assessment of the environmental impacts of various alternative ways to do a project, including a "No-Build" alternative. After receiving public comment on the Draft Environmental Impact Statement (see DEIS), the Final EIS is created.
EMU - Electric Multiple Unit - Electric powered commuter rail trains.
EPA - Environmental Protection Agency Earmarked Funds - When a project is included in an Appropriation Bill, the funds are thus assigned.
Express Service - Higher speed transportation operation designed to make a limited number of stops along a given route and generally provided during peak hours by express buses or rail vehicles.
Feeder Service - Local neighborhood circulator transportation service, which provides a high level of access and connections to major transportation corridors, i.e. shuttle buses bringing people to rail stations.
FEIS - Final Environmental Impact Statement - A document that responds to comments received on the DEIS and provides updated information that has become available after publication of the DEIS.
FFGA - Full Funding Grant Agreement - Under federal procedures, once a project is qualified for funding, the FTA enters into a "Full Funding Grant Agreement" or FFGA. The Agreement sets forth the maximum amount of the federal contribution, and the percentage of federal funding. FHWA - Federal Highway Administration - The agency of US DOT with jurisdiction over highways.
FONSI - Finding of No Significant Impact - Follows an EA.
FTA - Federal Transit Administration - The agency of US DOT with jurisdiction over transit.
GTR - Guide The Ride - An earlier regional transportation plan developed in the late 1990s.
Heavy Rail Transit - Steel wheel/steel rail transit constructed on exclusive private right-of-way, either above grade, at-grade, or below grade. Generally used to provide commuter service over longer distances at higher speeds, with fewer stops and larger vehicles than light rail transit.
HOV - High Occupancy Vehicle - A term used to describe vehicles that carry more than one passenger.
IGA - Intergovernmental Agreement - A written agreement between RTD and another governmental agency. These agreements usually address the allocation of funds across agencies or jurisdictions.
ISTEA - Intermodal Surface Transportation Efficiency Act - A federal law which sets formulas for how much money is allocated to each state for highways and public transit.
LPA - Locally Preferred Alternative - The alternative selected by the decision makers, in consultation with the community that is advanced for further action. The LPA will be confirmed or modified after the Draft Environmental Impact Statement is circulated for public comment.
LRT - Light Rail Transit - Steel wheel/steel rail transit constructed on city streets, semi-private right-of-way, or exclusive private right-of-way. Formerly know as "streetcar" or "trolley car" service, LRT's major advantage is operation in mixed street traffic at grade. LRT vehicles can be coupled into trains, which require only one operator and often are used to provide express service.
Mass Transit - The general term used to identify bus, fixed rail, or other types of transportation service available to the general public, which move relatively large numbers of people at one time.
MAC - Metro Area Connection - First corridor built in Denver from I-25/Broadway to 30th /Downing. Now known as the Central Corridor.
MIS - Major Investment Study - Mandated by federal law, a MIS is a study that examines transportation improvements for a corridor and determines the feasible alternatives. It allows local officials and citizens to participate in the planning process and helps to make sure all alternatives are carefully considered.
MOU - Memorandum of Understanding - An official agreement establishing the principles that will guide the implementation of programs or projects.
NAAQS - National Ambient Air Quality Standard
NEPA - National Environmental Policy Act - A federal law passed in 1969 to protect the environment during major projects.
North Line - The alignment between Auraria and Five-Points, also known as MAC
OCS - Overhead Catenary System - Overhead lines or overhead wires that are used to transmit electrical energy to light rail trains at a distance from the energy supply point.
park-n-Ride - A parking lot provided by the transit agency for customers to drive to, park and ride public transit.
P&D - Planning and Development
PIC - Public Information Consultant
PMC - Program Management Consultant
PMG - Project Management Group
PMO - Project Management Oversight
PMP - Program Management Plan
QA/QC - Quality Assurance/Quality Control
QMC - Quality Management Consultant
QPMR - Quality Project Manager Review
Rapid Transit - Transit service, which is operated completely separate from all other modes of transportation. The term "rail rapid transit" refers both to operation of light rail transit vehicles over exclusive private right-of-way and heavy rail transit vehicles; the term "bus rapid transit" refers to operation of motor-buses over exclusive bus roads or bus ways.
RFI - Request for Information
RFP - Request for Proposal
RFQ - Request for Qualifications
ROD - Record of Decision - A decision made by FTA as to whether RTD receives federal funding for a project. Follows an EIS.
Rolling Stock - The vehicles used in a transit system, including buses, rail cars, and trains.
ROW - Right-of-Way
RTD - Regional Transportation District
TDM - Transportation Demand Management - Strategies to attempt to reduce peak period automobile trips by encouraging the use of high occupancy modes through commuter assistance, parking incentives and work policies which alter the demand for travel in a defined area in terms of the total volume of traffic, the use of alternative modes of travel and the distribution of travel over different times of the day.
TDP - Transit Development Plan - A six-year long term financial plan for RTD that functions as the operating expense plan that is financially constrained and is updated/created every year. The first year of the plan is the basis for the next year's capital and expense budgets.
TIFIA - Transportation Infrastructure Financing Innovation Act
TMO - Transportation Management Organization - A voluntary association of public and private agencies and firms to cooperatively develop a transportation demand reduction program in a given area.
TOD - Transit-Oriented Development - An initiative to build transit ridership, while discouraging sprawl, improving air quality and helping to coordinate a new type of community for residents. TODs are compact, mixed-use developments situated at or around transit stops. Sometimes referred to as Transit Oriented Communities, or Transit Villages.
TOFC - Truck On Flat Car - Also called a piggyback, this is a truck trailer that is transported on a rail flat car.
USDOT - United States Department of Transportation
UTPS - Urban Transportation Planning System - A group of computer programs used to forecast future demands and patterns.