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M40 J12-J14 –
Data Analysis, Modelling and
Scheme Development
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Existing Situation – M40 J14
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Early 2011 WCC was approached by Warwickshire Police and HA
regarding queuing on the southbound slip J14
Surveys undertaken identified a significant flow from J14, turning right at
Greys Mallory roundabout and heading south on the B4100 between 07000800
Queuing at J14 is partly related to the high movement to the B4100 (i.e
Jaguar Land Rover(JLR) and Aston Martin Lagonda(AML) commuters) and
also to capacity constraints on the A452 Europa Way corridor
2011/12 a detailed modelling exercise was undertaken, schemes identified
and funding secured.
WCC are currently constructing the scheme, the majority of work is
due to be completed early December, ahead of our anticipated
timescales.
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Existing Situation – M40 J12
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Late 2011 queuing issues on SB slip at J12 were
reported to WCC.
Traffic surveys and site observations identify an
early peak hour for traffic arriving at the JLR/AML
sites between 0700-0800.
Approx. 80% of employees originate from north of
the sites and access them via M40 J12 or via the
parallel B4100 route.
Commuters to the sites make up 90% of the traffic
on the B4100 and other roads in the vicinity during
0700-0800 period.
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Existing Situation – M40 J12
• Significant safety risk commuters and
other traffic on M40.
• Extant planning permissions, JLR
equivalent to 2,000 jobs and AML 600
jobs.
• JLR/AML have no outstanding planning
obligations to deliver highway mitigation
related.
• 20% car share, WCC/JLR in talks with
Stagecoach.
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Existing Queuing Conditions
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What immediate action was taken?
Interim Measures
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Temporary queue warning/ATM signs on M40.
Relocation of signs and vegetation removal at J12 to improve visibility.
Changes to lining and operation at JLR/AML roundabouts and at Gaydon
roundabout.
Recommendation to HA for anti-skid surfacing at J12.
JLR commuter coaches from Leamington.
Other recent developments include:
• Implementation of a new extended Stagecoach X17 bus service providing
high quality, frequent public transport to the site.
• New JLR P&R service from Coventry.
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What action was taken in the longer term?
Longer Term Measures
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Completed J12-14 S-Paramics microsimulation base and future year(2022)
models which include route choice between B4100 and M40.
Schemes considered included;
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Signalisation of the M40 J12 slips
Link capacity improvements
Junction improvement at Gaydon roundabout
Capacity improvements at JLR and AML roundabouts
Capacity improvements at JLR and AML security gates
Lane drop on M40
Full grade separation
Schemes were assessed in terms of feasibility, buildability, modelling
performance and cost.
S-Paramics microsimulation modelling software information can be found at:
http://www.sias.com/2013/sp/sparamicshome.htm
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Modelling Information and Assumptions
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2011.1 S-Paramics Microsimulation (latest version at the time).
Dynamic route choice model – this means it can identify the behaviour of
traffic and decision making on route choice. This enables the switching
between B4100 and M40 routes to be captured.
WCC has extensive experience in this software and ARUP assisted with
model development and 3rd party audit by JMP.
Time periods covered in the modelling include morning peak 0600-1000 and
evening peak 1600-1900 which covers the busiest periods in the area.
Models are calibrated and validated to observed conditions and are well
within the industry standard criteria set out in the DfT Design Manual for
Roads and Bridges.
Tested with growth assumptions to 2015(year opening) and 2025.
An iterative process of design and modelling was undertaken to identify the
optimum scheme within the cost and build constraints.
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Model Coverage
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Identified Scheme
The area marked in red is being
funded and promoted by the
Highways Agency. The dual
carriageway link from M40 J12
to the Jaguar Land Rover and
Heritage Motor Centre entrance
is being promoted by WCC
Metres
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Scheme Costs
J14 Costs and Funding
• £2m budgeted cost. Current estimate £1.95m.
• £1m successful bid to DfT Local Pinch Pont Fund which will reduce the
burden on the County
J12 Costs and Funding
• HA - £10m budgeted (Autumn Statement 2012)
• WCC - £8.8m.
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£3m county funding.
£3.3m successful Regional Growth Fund bid
£3.3m successful DfT Local Pinch Point Fund bid
JLR to fund all works within their site
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Risks
•Highways Agency element of the scheme now out of WCC control.
•Disruption during construction period.
•Ecological/environmental works must be completed ahead of construction, due
there is a limited window in which these works can be completed, any delay
could be catastrophic due to external funding timing constraints.
•Uncharted services and emergency utility works.
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Further Work
J14
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Scheme stated construction in August 2013.
Scheme will be completed in December 2013.
Monitoring and evaluation 1 year and 5 years post completion.
J12
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Planning Application submitted October 2013
Detailed design and tender.
Model traffic management options.
Environmental works early 2014.
Commence works on site Summer 2014.
12 month construction period.
• Monitoring and evaluation 1 year and 5 years post completion.