Transit Capacity and Quality of Service Manual, Third Edition (2013) / Chapter Skim
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Pages 717-784
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1. User's Guide 2.
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Transit Capacity and Quality of Service Manual, 3'd Edition 1. GLOSSARY This chapter presents definitions for the various transit terms discussed and referenced in the TCQSM.
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Transit Capacity and Quality of Service Manual, 3'd Edition measure of the ability of all people to get to and from the nearest transit stop or station and their actual origin or destination.
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Transit Capacity and Quality of Service Manual, 3'd Edition annual average daily traffic- see traffic, annual average daily. annual average weekday traffic- see traffic, annual average weekday.
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Transit Capacity and Quality of Service Manual, 3'd Edition to stop or control a train's speed at designated restrictions, should the operator not respond. The system usually works in conjunction with cab signals (more correctly called automatic train stop)
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Transit Capacity and Quality of Service Manual, 3'd Edition hi-level car- see car, hi-level. blister - see bus bay.
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Transit Capacity and Quality of Service Manual, 3'd Edition which standing passengers become uncomfortable or may lose their balance. brake, slip-slide control- an electronic control used on most current rail vehicles to sense and correct wheel slip or slide by modulating braking or reducing acceleration.
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Transit Capacity and Quality of Service Manual, 3'd Edition bus, dual-mode- 1. a bus designed to operate both on city streets and on rails or other types of guideway; also known as a dual-control bus.
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Transit Capacity and Quality of Service Manual, 3'd Edition pulling into the curb, gives priority to buses and eases reentry into traffic, often landscaped and fitted with bus shelter and other passenger amenities. Also called bus bulge, curb bulge, and curb extension.
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Transit Capacity and Quality of Service Manual, 3'd Edition representing the additional weight for which the car structure is designed or for which the propulsion and braking system will meet minimum performance criteria. capacity, design- 1.
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Transit Capacity and Quality of Service Manual, 3'd Edition operation. Designs available with folding steps, capable of boarding and discharging passengers at either track or car-floor level, as in San Francisco and Hannover.
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Transit Capacity and Quality of Service Manual, 3'd Edition carrier, common - in urban transportation, a company or agency certified by a regulatory body to carry all passengers who fulfill the contract (e.g., pay the required fare)
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Transit Capacity and Quality of Service Manual, 3'd Edition system is used to overcome steep gradients. Similar Fell system uses adhesion grip on center rail without gear teeth.
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Transit Capacity and Quality of Service Manual, 3'd Edition control system, automatic block signal (ABS) a system of governing train separation in which the signals are controlled by the trains themselves.
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Transit Capacity and Quality of Service Manual, 3'd Edition coverage area- see area, coverage. critical line condition- in rail transit operations the factor that constrains headway.
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Transit Capacity and Quality of Service Manual, 3'd Edition for peak-period express or other bus service, or a rail service. See also service, feeder.
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Transit Capacity and Quality of Service Manual, 3'd Edition dispatching- 1. in rail operations, the process of starting a transit unit (car or train)
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Transit Capacity and Quality of Service Manual, 3'd Edition location of service; in other words, producing the intended result (doing the right things)
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Transit Capacity and Quality of Service Manual, 3'd Edition FTA- Federal Transit Administration; see U.S. Government, Federal Transit Administration.
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Transit Capacity and Quality of Service Manual, 3'd Edition exit, at which point an additional fare may be subtracted. The system may include special equipment for transporting and counting revenues.
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Transit Capacity and Quality of Service Manual, 3'd Edition free transfer- see transfer,free. freeway- a divided highway for through traffic that has full access control and grade separations at all intersections.
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Transit Capacity and Quality of Service Manual, 3'd Edition governor- 1. a device that keeps a transit vehicle from exceeding a set (maximum)
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Transit Capacity and Quality of Service Manual, 3'd Edition to provide regular head ways and hence load distribution, even at the expense of reducing timetable adherence. heavy rail - see transit system, rail rapid.
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Transit Capacity and Quality of Service Manual, 3'd Edition index- a performance measure developed by weighting two or more other performance measures. indication, signal- see signal indication.
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Transit Capacity and Quality of Service Manual, 3'd Edition jerk- time rate of change of acceleration or deceleration of a vehicle, measured in ft/s 3 (m/s3)
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Transit Capacity and Quality of Service Manual, 3'd Edition lane, stair- the portion of a stair's width normally occupied by a single line of pedestrians, typically 22 to 36 in.
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Transit Capacity and Quality of Service Manual, 3'd Edition line-of-sight- a mode of rail operation where the transit vehicle operator is responsible for maintaining a safe distance from the preceding vehicle. linear electric motor- see motor, linear electric.
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Transit Capacity and Quality of Service Manual, 3'd Edition loop detectors - a loop of wire embedded in the roadbed that carries a small electric current used to sense a passing vehicle and to yield information about the presence of the vehicle. Loop detectors are also used to actuate traffic signals and detect roadway incidents.
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Transit Capacity and Quality of Service Manual, 3'd Edition maximum load section (MLS) - the section of a transit line or route that carries the highest total number of passengers for that line or route and direction.
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Transit Capacity and Quality of Service Manual, 3'd Edition motor that produces mechanical force through linear, instead of rotary, motion, used to propel vehicles along a track or other guideway. The vehicle borne motor creates a "moving" magnetic field that is translated into linear motion via an inert steel guideway reaction rail, often laminated and aluminum covered.
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From page 747... ...
Transit Capacity and Quality of Service Manual, 3'd Edition National Transit Database (NTD) - a database compiled by the Federal Transit Administration of operating and financial statistics for over 600 transit agencies in the United States (those systems eligible for grants under Title 49 United States Code, Chapter 53-Mass Transportation, Section 5307.)
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Transit Capacity and Quality of Service Manual, 3'd Edition operating ratio - the ratio of operating expenses to operating revenue; the inverse of cost recovery ratio. It is used as a measure of financial efficiency.
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Transit Capacity and Quality of Service Manual, 3'd Edition organizations, Transportation Research Board -a unit of the National Research Council, operating under the corporate authority of the private and nonprofit National Academy of Sciences. The purpose ofTRB is to advance knowledge concerning the nature and performance of transportation systems by stimulating research and disseminating the information derived therefrom.
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From page 750... ...
Transit Capacity and Quality of Service Manual, 3'd Edition of a fee, while the occupants of the automobiles are using other facilities or services. parking turnover- the ratio of the total number of parked vehicles accommodated during a given period in a specified area to the total number of parking spaces in that area.
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Transit Capacity and Quality of Service Manual, 3'd Edition peak-hour factor (peak-hour conversion factor)
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Transit Capacity and Quality of Service Manual, 3'd Edition pocket track- a third track to store spare or disabled trains, or to act a crossover or a turn back, often located between the two main tracks and often with switches at both ends. point, maximum load- see maximum load point.
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Transit Capacity and Quality of Service Manual, 3'd Edition public transit - passenger transportation service, usually local in scope, that is available to any person who pays a prescribed fare. It operates on established schedules along designated routes or lines with specific stops and is designed to move relatively large numbers of people at one time.
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From page 754... ...
Transit Capacity and Quality of Service Manual, 3'd Edition rail, third (contact rail, power rail) - an electric conductor, located alongside the running rail, from which power is collected by means of a sliding shoe attached to the truck of electric rail cars or locomotives.
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Transit Capacity and Quality of Service Manual, 3'd Edition reliability- how often transit service is provided as promised; affects waiting time, consistency of passenger arrivals from day to day, total trip time, and loading levels. request stop -see service, request stop.
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From page 756... ...
Transit Capacity and Quality of Service Manual, 3'd Edition of controlled access lanes may also be permitted for vehicles preparing to turn. The restriction must be sufficiently enforced so that 95% of vehicles using the lanes during the restricted period are authorized to use them.
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Transit Capacity and Quality of Service Manual, 3'd Edition run- 1. the movement of a transit unit (vehicle or train)
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Transit Capacity and Quality of Service Manual, 3'd Edition self-propelled or self-powered car- see car, rail motor. self-service, barrier-free fare collection system -see fare collection system, open, barrier-free, proof of payment, self-service.
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Transit Capacity and Quality of Service Manual, 3'd Edition stops along the way. Usually service is intensive (high capacity)
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Transit Capacity and Quality of Service Manual, 3'd Edition may be privately owned, leased from a public or private company, or provided by the employer. The driver is usually a member ofthe group.
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Transit Capacity and Quality of Service Manual, 3'd Edition signal, automatic-block- a system in which signals are actuated automatically by the presence of a train on the track section, usually with an electric track circuit to detect the presence of any vehicle, and any broken rails. signal, block- a fixed signal installed at the entrance of a block to govern trains entering and using that section of track.
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Transit Capacity and Quality of Service Manual, 3'd Edition recovery time, in some areas, also known as operating speed. speed-flow relationship- the relationship between the flow (volume)
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Transit Capacity and Quality of Service Manual, 3'd Edition street, bus-only- a street devoted to bus traffic only. street, mixed-mode- a street carrying mixed traffic, that is, having no exclusive transit lanes or priority lanes for transit.
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Transit Capacity and Quality of Service Manual, 3'd Edition symmetrical monorail- see transit system, monorail. synchronous motor- see motor, synchronous.
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Transit Capacity and Quality of Service Manual, 3'd Edition third rail- see rail, third. third-rail shoe- a graphite sliding contact attached to the trucks of electric rail vehicles for the purpose of collecting current from the third-rail distribution system; uses gravity or spring pressure.
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From page 766... ...
Transit Capacity and Quality of Service Manual, 3'd Edition time, turnaround- see time, layover. time, unlinked trip- in planning, the time duration of an unlinked trip, that is, one made on a single vehicle.
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From page 767... ...
Transit Capacity and Quality of Service Manual, 3'd Edition trackless trolley- trolleybus, mainly East Coast usage, see trolleybus. trackwork- the rails, switches, frogs, crossings, fastenings, pads, ties, and ballast or track-support slab over which rail cars are operated.
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From page 768... ...
Transit Capacity and Quality of Service Manual, 3'd Edition certain rules that may limit the direction of travel or the time in which the change may be made. transfer, free - a transfer that requires no additional payment.
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Transit Capacity and Quality of Service Manual, 3'd Edition transit system- the facilities, equipment, personnel, and procedures needed to provide and maintain public transit service. transit system, accessible - a transit system that can transport any mobile person, including those who are physically disabled, and in which the vehicles and stops or stations are designed to accommodate patrons who are confined to wheelchairs.
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Transit Capacity and Quality of Service Manual, 3'd Edition with some of these features is in Morgantown, West Virginia. transit system, pre-metro- a light rail transit system designed with provisions for easy conversion to heavy rail (rail rapid transit)
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Transit Capacity and Quality of Service Manual, 3'd Edition alternatives for trip making. Examples include the young, the elderly, the poor, persons with disabilities, and those who do not have automobiles.
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Transit Capacity and Quality of Service Manual, 3'd Edition Travel Demand Management- National ITS Program User Service that supports policies and regulations designed to mitigate the environmental and social impacts of traffic congestion. See also Transportation Demand Management.
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Transit Capacity and Quality of Service Manual, 3'd Edition trip purpose - the primary reason for making a trip, for example, work, shopping, medical appointment, recreation. trip time- see time, linked trip and time, unlinked trip.
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Transit Capacity and Quality of Service Manual, 3'd Edition Their membership is limited to operators, mechanics, and other non-supervisory employees. A non-affiliated Independent Canadian Transit Union has raided older unions and represents some transit systems in Canada, the largest being BC Transit.
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Transit Capacity and Quality of Service Manual, 3'd Edition Federal Transit Administration; see U.S. Government, Federal Transit Administration.
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Transit Capacity and Quality of Service Manual, 3'd Edition transit vehicles, it includes dwell times at stops or stations, acceleration, and deceleration.
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Transit Capacity and Quality of Service Manual, 3'd Edition Z zone, auto-free- see autojree zone. zone, auto-restricted- see autorestricted zone.
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Transit Capacity and Quality of Service Manual, 3'd Edition 2. LIST OF SYMBOLS This section lists all of the symbols used in equations in the TCQSM and their units.
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Transit Capacity and Quality of Service Manual, 3'd Edition dec = pedestrian crossing delay exceeding 30 s (s) dp = average pedestrian delay ( s)
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Transit Capacity and Quality of Service Manual, 3'd Edition j;1 = perceived travel time factor (unitless) fv = motorized vehicle volume adjustment factor (unitless)
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Transit Capacity and Quality of Service Manual, 3'd Edition Lw = walkway length (ft, m) M = pedestrian space (ftZjp, mZjp)
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Transit Capacity and Quality of Service Manual, 3'd Edition q9 = arrival flow rate during the effective green time (vehjs) q, = arrival flow rate during the effective red time (vehjs)
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Transit Capacity and Quality of Service Manual, 3'd Edition train can depart ( s) t; = dwell time value that will not be exceeded more often than the desired failure rate (s)
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Transit Capacity and Quality of Service Manual, 3'd Edition vjc Va Val Vb Vc1 Vd Ve Vi = = = = = = = = volume-to-capacity ratio ( unitless) station approach speed (ftjs, mjs)
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