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Inter Urban ITS ITS on the Trunk Road Network November 2006
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The Challenges
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The benefits of Inter-Urban ITS, 23rd November 2006 The Trunk Road Network The Highways Agency has 7,754 km of road Valued at over £65 bn Caries a third of all road traffic Caries two thirds of all heavy freight traffic More than 170 bn vehicle km travelled across it each year. The Highways Agency’s Assets
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The benefits of Inter-Urban ITS, 23rd November 2006 The Highways Agency Now no longer a primarily network builder Primarily now a network operator Stated objectives include: Reducing Congestion and improving reliability Improving road safety Respecting the environment Seeking feedback from customers
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The benefits of Inter-Urban ITS, 23rd November 2006 How they use ITS Reducing Congestion and improving reliability Improving road safety Respecting the environment Image 1 Image 2
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The benefits of Inter-Urban ITS, 23rd November 2006 Why Congestion? Capacity Less than Demand High Demand reduces Capacity Flow Breakdown
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The benefits of Inter-Urban ITS, 23rd November 2006 High Occupancy Vehicle Lanes Part of new build Intended to “Lock in” Capacity benefits Part of respect for the environment Becoming feasible through new technology Tell people apart from dummies Differentiate between human and other animals Be able to do this through fog, rain and glare
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The benefits of Inter-Urban ITS, 23rd November 2006 High Occupancy Toll Lanes Further development of the HOV lane Variable tolls Allows better use of road space Both HOV lanes and HOT lanes are subject to a lot of criticism
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The benefits of Inter-Urban ITS, 23rd November 2006 Smart Tolling “Smart Card” Technology Speeds throughput Reduces revenue costs Real-time Information available
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The benefits of Inter-Urban ITS, 23rd November 2006 Ramp Metering Primarily used in the USA Keep highway traffic free flowing Controlled access to the motorways
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The benefits of Inter-Urban ITS, 23rd November 2006 Traffic Control Centres On the HA Network this is the NTCC Monitoring and Reactions Uses MIDAS New developments NASS React through VMS and Traffic Officers and Police
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The benefits of Inter-Urban ITS, 23rd November 2006 And the future… Cooperative Vehicle Highway systems In Vehicle technology In road technology Benefits anticipated for speed, capacity and safety Major investment needed Now have HA Fibre Optic Network
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The benefits of Inter-Urban ITS, 23rd November 2006 Improving Safety on the road network One of the Department for transport’s objectives is to: “reduce the number of people killed or seriously injured in Great Britain in road accidents by 40%, the number of children killed or seriously injured by 50% (all roads) and 10% reduction in the rate of slight casualties by 2010, compared with the 1994-98 average”
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The benefits of Inter-Urban ITS, 23rd November 2006 Active Traffic Management, Controlled Motorway and MIDAS Controlled Motorway on the M25 began in 1996 The ATM section on the M42 opened in 2006 Active Control and Management of the Network
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The benefits of Inter-Urban ITS, 23rd November 2006 What does Controlled Motorway and ATM include Variable Speed Limits Hard Shoulder Running Incident warning and management
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The benefits of Inter-Urban ITS, 23rd November 2006 The Benefits of Variable Speed Limits Helps prevent flow breakdown Helps stop rear end collisions Reduces stop/start traffic flow Rigorous speed enforcement Improved journey time Safety benefit Fuel economy savings Safety benefit
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The benefits of Inter-Urban ITS, 23rd November 2006 Issues to consider: Merging and Diverging, length between junctions Tidal Flow Number of lanes
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The benefits of Inter-Urban ITS, 23rd November 2006 Daily flow levels Distribution of Traffic on the M42 Chart from Excel
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The benefits of Inter-Urban ITS, 23rd November 2006 Comparison of After Data with the before data
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The benefits of Inter-Urban ITS, 23rd November 2006 Benefits from the M25 Not all effects are positive Benefits are dependant on flow levels and congestion Most significant benefits are from Safety Value per year in 2002 prices (not discounted) Clockwise CarriagewayAnticlockwise CarriagewayBoth Carriageways Journey Time improvement -£52,862,826£51,067,334-£1,795,492 Accident reduction£52,168,177£51,552,722£103,720,899 Fuel Consumption Cost savings £13,487,016£9,380,136£22,867,152 £12,792,367£112,000,192£124,792,559
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The benefits of Inter-Urban ITS, 23rd November 2006 Results for the cost benefit analysis on the M25 Clockwise CarriagewayAnticlockwise Carriageway Both Carriageways BCR 30-years 1.247.044.14 BCR 60-years 1.5011.516.51 These figures illustrate the safety benefits Controlled motorway has a very respectable benefit : cost ratio Technology needs to be correctly applied and tuned
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The benefits of Inter-Urban ITS, 23rd November 2006 Controlled Motorway Government Approach: (WEBTAG) Assess wide range of benefits and disbenefits in the following categories: Environment Safety Economy Accessibility Integration Produce a comparison table called an Appraisal Summary Table (AST) See: www.webtag.org.uk for detailswww.webtag.org.uk Scheme Assessment: WEBTAG
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Any Questions…
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The benefits of Inter-Urban ITS, 23rd November 2006 Any further details needed? I can be contacted at: James.perrott@fabermaunsell.com Telephone: 0121 262 6076
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