Traffic congestion in Bath is a major problem that
impacts on the local economy, the environment, the community and the infrastructure.
At the same time much of the traffic to Bath brings visitors and workers to the
City to ensure it thrives, or is essential local journeys undertaken by the community.
However, Bath also suffers from through and extraneous traffic, which makes no contribution
to the City but for which the City pays the cost in terms of environmental impact.
Callidus has examined this issue and looked at ways
that the demand for traffic might be controlled. Amongst the ideas is to apply some
kind of fiscal (monetary) measure that seeks to charge drivers an amount that better
reflects the external costs of their journey making. In so doing, the demand for
trips is likely to reduce, or the cost of making the trip compensates for the impact
that the trip is having.
The concept is shown in the graph below. A charge
is made to existing trips (Q) such that demand decreases to a level that is equal
to the social cost of travel supply. This happens at a lower number of trips (Q*)
.
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