The SoCoMMS Model Paul Read Dan Jones

The Presentation Outline of the Study The Modelling Framework Accessibility Model

What is SoCoMMS? One of the Government’s Multi-modal studies Study area from Southampton to Thanet Examined issues across all modes Developed a Transport Strategy for input into the South East Regional Strategy

Study Area

The Need for Models to understand current problems to understand future impacts of growth, land use change and role changes (visions) assess implications of alternative transport packages and strategies providing objective outputs for use in appraisal - efficiency, environment, safety, regeneration, accessibility, integration

Strategic Corridor Model Multi-modal model four stage model based on trip data from existing models built in EMME/2 format trip purpose segmentation (also freight) outputs to appraisal

Networks Wide area of coverage highway network rail network bus services (interurban) ferry services

Trip Purposes Private Vehicle, Public Transport home based work business other Freight light goods other goods

Other Parts to the Strategic Model Forecasting Procedure Distribution Model Mode Choice Model Induced effects Trip suppression

Uses of Strategic Model Rail service changes Rail infrastructure Bus service changes Demand Management (tolls, parking) Road traffic reduction Land use changes Highway measures

Strategy Development Based on findings of component tests further work undertaken to develop emerging strategy. This is based around a starting combination, with components being added / subtracted so as to determine contribution that each makes to overall package

StartNo Persuasive Measures Additional Roads Less Roads Additional Rail Less Rail Alternative Rail Alternative Road Less Local PT More Local PT Alternative Local PT More Coercion Less Coercion Alternative Coercion

StartNo Persuasive Measures Additional Roads Less Roads Additional Rail Less Rail Alternative Rail Alternative Road Less Local PT More Local PT Alternative Local PT More Coercion Less Coercion Alternative Coercion

StartNo Persuasive Measures Additional Roads Less Roads Additional Rail Less Rail Alternative Rail Alternative Road Less Local PT More Local PT Alternative Local PT More Coercion Less Coercion Alternative Coercion

Increases in rail usage

Changes in Traffic Patterns

Key Outputs Network performance Economic evaluation Environmental analyses Impact on regeneration – importance of accessibility

Why the need for an Accessibility Model? Multi-criteria analysis Impact of transport on deprivation and employment Localised impacts  small zones Significant employment outside region  wide area coverage

Overview of Accessibility Model Two models: highway and public transport Large study area, small zones (5362) Cannot use usual methods (licence) Use of EMME/2 modules 5.34/5.35 Networks and travel times from 6 ‘source’ models (3 highway, 3 PT)

Procedures – highway 1)Prepare network 2)Prepare zones and connect to network 3)Build paths through the network 4)Calculate accessibility measures 5)Loop through 2) to 4) for all origins 6)Transfer results to GIS

Prepare network Assign and skim source models (3) Dump networks and times Reformat to EMME/2 batch-in Renumber nodes to avoid duplicates Batch-in to EMME/2 (times in ul1) Identify join lines, delete overlaps Connect networks along join lines Check!

Procedures – highway 1)Prepare network 2)Prepare zones and connect to network 3)Build paths through the network 4)Calculate accessibility measures 5)Loop through 2) to 4) for all origins 6)Transfer results to GIS

Connect ‘zones’ to network Module 5.34: process one OD at a time Create file of zone centres (x,y) Define: search radius, number of connections Input file: origin and destination co-ordinates Batch: one origin, 5362 destinations Output file: access/egress nodes

Procedures – highway 1)Prepare network 2)Prepare zones and connect to network 3)Build paths through the network 4)Calculate accessibility measures 5)Loop through 2) to 4) for all origins 6)Transfer results to GIS

Build best paths through the network Module 5.35: process one OD at a time Add auxiliary mode to all links (time = ul1) Define: access/egress speed, parameters Input file (from 5.34): origin and destination co-ordinates, access and egress nodes Batch: one origin, 5362 destinations Output file: best path times

Procedures – highway 1)Prepare network 2)Prepare zones and connect to network 3)Build paths through the network 4)Calculate accessibility measures 5)Loop through 2) to 4) for all origins 6)Transfer results to GIS

Calculate accessibility measures Combine travel times and zone data Inputs: journey times, population and employment data, accessibility function What measure is required?  Accessibility function –Step function:e.g. jobs within 30 minutes –Curve: jobs weighted (weight  as time  )

Procedures 1)Prepare network 2)Prepare zones and connect to network 3)Build paths through the network 4)Calculate accessibility measures 5)Loop through 2) to 4) for all origins 6)Transfer results to GIS

Results Central Hastings A.I. (Jobs) –2000 Base = 0.44m –2026 Do Minimum= 0.32m –2026 Do Something = 0.37m Plot and analyse further in GIS

Summary Developed a strategic modelling framework Strategic model used to incrementally develop the strategy Provided key outputs to decision makers Accessibility model used to address key issue of regeneration benefits