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Projects> New
Tyne Crossing
New Tyne Crossing
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We were appointed by Bouygues Travaux Publics SA as
traffic and revenue advisors for the New Tyne Crossing PPP study.
As one of the bidders for the 30 year concession, Bouygues would
be required to pay for, design, and construct an immersed tunnel
in the vicinity of the existing Tyne Tunnel and operate both tolled
tunnels, and pedestrian and cycle tunnels, during the concession
period.
The new tunnel, estimated to cost £180 million
to construct, is expected to be opened in 2009. As advisors, we converted
an existing
TRIPS highway model to SATURN in order to assess predicted traffic
volumes along the A19 corridor and over the existing cross-Tyne
links. To facilitate this process we commissioned traffic surveys
and reviewed
land-use and planning data to update all model inputs to a 2006
Current Year. The assignment model was run for three time periods
and four
journey purposes. The resultant model was revalidated based on
screenline flows, queue lengths and journey times. Having validated
the model,
demand forecasts for four future years were developed.
A desk-top
review of values of time undertaken by MVA was used as input
into the revenue forecasts, for which various risk scenarios were
assessed.
The demand and revenue forecasts were audited by an external
consultant.
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