Solent Transport’s Sub Regional Transport Model

Solent Transport’s Sub Regional Transport Model

Model Overview

SYSTRA was originally commissioned in 2010 to support the development and application of Solent Transport’s Sub Regional Transport Model (SRTM). The TAG compliant, Land Use Transport Interaction (LUTI) model represents the travel demand and behaviour of key travel modes in South Hampshire (road traffic, bus, rail, ferries and active modes). The model also contains processes to examine travel demand at the region’s key international gateways – the primary seaports at Southampton and Portsmouth, and Southampton Airport. The model was updated by SYSTRA in 2016-17 and 2021-22 to refresh the underlying traffic survey and landuse data.

The model consists of five main elements as follows:

  • Road Traffic Model built in SATURN
  • Public Transport Model built in CUBE Voyager
  • Local Economic Impact Model (LEIM) built by David Simmonds Consultancy using DELTA
  • Gateway Demand Model to represent port and airport demand built using CUBE
  • Main Demand Model built in SYSTRA’s demand model software using C# and SQL databases

Model Application

Since developing the Solent Transport’s Sub Regional Transport Model, SYSTRA has been the sole operator for Solent Transport with over 200 commissions including Public and Private sector clients. Key projects SYSTRA has undertaken include:

  • Business Case Preparation including successful funding bids for:
    • Transforming Cities Fund. Portsmouth (£56m) and Southampton (£57m)
    • Stubbington Bypass – Solent LEP £34m
  • National Highways Assessments: Stages 1 and 2 Project Control Framework (PCF) Assessments for M27 and M3 Smart Motorways
  • Local Plan Assessments: assessment of transport impacts for districts across south Hampshire including: Eastleigh Fareham, Gosport, Havant; Southampton, Isle of Wight, Portsmouth.
  • Strategy Formulation including Solent Transport Delivery Plan which identifies the interventions required to support planned growth in South Hampshire and the Isle of Wight.
  • Air Quality Assessments including Portsmouth City Centre Clean Air Zone (CAZ) implemented in late 2021.
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