A LUTI Model for Cambridge: Applications for Strategic Planning and Development Control
Tim Gent, WSP
This paper presents details of a Land Use Transport Integration model for Cambridgeshire which was developed in 2008/09. The innovative model structure and approach is outlined, together with examples of strategic and development level applications.
"The Cambridge Sub Regional Model (CSRM) is a Land Use Transport Interaction (LUTI) Model implemented in MEPLAN and SATURN. It was developed for Cambridgeshire County Council (CCC) in 2006-2009, with detailed and sophisticated modelling of activity location, travel demand and assignment of all modes. Following the investment in the model and completion of work on Cambridge congestion charging, the potential for the model to test land use and transport impacts of commercial and residential development sites was explored. Co-operation has been required between the modelling consultants, planning authorities, developers and their agents to pinpoint the correct time to use a LUTI model, and define the relevant modelling tests. Increasingly, land developers have recognised the benefits and embraced early use of the model.
The structure and innovative approach to the model will be outlined, including the Land Use model structure and separation of cycling as a separate user mode in the choice hierarchy, fully-assigned in the network model.
The paper includes some examples of application of the model for strategic planning, and discussion of the strengths/weaknesses of the approach. Additionally, an extended case study is included of an application to a major development site in Cambridge. The application of the model here produced results which differed from standard approaches, and were accepted as more relevant to the planning application, for the reason that commuting patterns and balance of jobs vs workers were explicitly considered and valued. The reasons for this and implications for planning decisions are discussed.
With the recent publication of the UK 2011 Census, there has also been opportunity to test the models success in tracking changes in land use. The results of this comparison will be shared and the implications discussed."
Association for European Transport