Many of the terms in this glossary can be defined in several ways.
The definitions provided are the ones which have been used in the
PROSPECTS project. Definitions of individual policy instruments are
not included but can be found in KonSULT.
The meanings of words in italics can be found elsewhere in this
glossary.
Accessibility The accessibility of an activity
to an individual is the ease with which the individual can get to
the places where that activity can be performed
Appraisal Assessing the relative merits of strategies
before they are implemented
Barrier An obstacle which prevents a given policy
instrument or strategy being implemented, or limits
its implementation in some way. A constraint is
similar
Complementarity A condition where the component
instruments of a strategy have a greater beneficial effect than
any instrument on its own
Cost-benefit analysis Appraisal of the
economic efficiency of a strategy, by weighing the costs
of a strategy against the benefits it might bring, over
a number of years into the future
Efficiency (or economic efficiency) Maximising
the benefits which users can gain from the transport system, after
taking account of the costs of provision and operation of the system
Environment Environmental impacts include noise,
air pollution, vibration, visual intrusion, severance, intimidation,
and the loss of flora, fauna and historic buildings
Equity Equality, especially between different
groups in society, in opportunities to travel, costs of travel and
environmental and safety impacts of travel
Evaluation The process of finding out, after implementation,
what the real impacts of a strategy have been and how they
compare to what was expected beforehand
Indicator Ways of quantifying objectives:
for example, road accident numbers are one indicator of safety
Instrument Also known as measures, instruments
are the specific components (e.g. lower bus fares, road pricing)
of a strategy
Intergenerational equity Meeting the needs of
the present without compromising the ability of future generations
to meet their own needs. (See also the full definition of sustainability
in Section 7 of this Guidebook)
Integration Integration involves combining instruments
so that they reinforce one another and create synergy in
meeting objectives
Land use The function of a given area of land.
Examples of types of land use include: residential, industrial,
commercial, agricultural and recreational
Liveable streets Pleasant street and outdoor conditions.
It includes the positive external effects on social, cultural and
recreational activity in neighbourhoods
Management How the transport system is managed
and operated, usually to reduce congestion and accidents and to
protect the environment. Demand management
encompasses measures to affect how people travel. Traffic
management is the allocation of road space to different
users
Mobility Ease of moving about. Often specifically
meaning access to a private vehicle for travel
Model A (mathematical) representation of the relationships
within the land use / transport system; widely used to predict the
outcomes of transport strategies
Monitoring A continuous programme of measuring
changes in the transport system
Multi-criteria appraisal Appraisal against
more than one objective
Objective A broad statement of the improvements
which a city is seeking. Objectives specify the directions for improvement,
but not the means of achieving it
Objective function One or more objectives
incorporated into a mathematical expression, often used in modelling
as part of an optimisation process
Optimal An optimal strategy is one which
performs best against its objectives
Optimisation A (mathematical) process to determine
the optimal transport strategy
Policy A broad approach towards transport and
land use planning, including the specification of objectives
and the choice of a strategy and its component instruments
Pricing The way in which users are charged for
using the transport system. Road pricing is a pricing
system where motorists pay directly for using the roads
Reliability For the road system, reliability means
little daily variation in travel time. For the public transport
system, it means that vehicles depart on time and arrive at stops
on schedule
Revenue Income from transport pricing
Robust Likely to be successful in a wide range
of future scenarios
Scenario A possible future set of demographic
and economic conditions
Sensitivity analysis Is a programme of tests of
a strategy to find out how its performance changes with
changes in the assumptions made
Stakeholder All people and organisations which
have an interest in the transport system
Strategy A combination of instruments
to meet a given set of objectives
Synergy A condition where the component instruments
of a strategy have a greater beneficial effect than the
sum of their parts
Target An aimed-for value of an indicator
Threshold The value of an indicator which
should not be exceeded
|