Overview

LATIS has the following elements:

  • Models - LATIS manages the development, maintenance and application of national and regional transport models and a national land use model. This is supported by a library of reports.
  • Planning support - the collection and provision of planning data and support to Development Planning and Management Transport Appraisal
  • Data Collection - the collection of transport and travel data and other user specified data through the use of the Data Collection Contract and the provision of model output data to transport and development planners and modellers. The Scottish Trip End Programme provides trip-end data for transport planning
  • User Engagement - a continuous programme of consultations and discussion events on a range of issues, including the development and application of transport and traffic models, the role of integrated transport and land use modelling, how best to support to strategic land use planning and how to improve data quality

LATIS has a robust database of transport, land-use and demographic data which is linked to a multi-modal transport and land-use modelling suite. This enables decision making across a range of policy areas. Its consistent approach delivers a robust evidence base from which to appraise schemes and policies. This also allows it to measure the key economic, social and environmental impacts of interventions.

LATIS can be applied at local, regional and national levels, and has been used in a range of infrastructure, planning and policy analysis and assessments. Two key examples of LATIS applications are the Strategic Transport Projects Review (STPR) and Forth Replacement Crossing study.

Apply to use LATIS

Land-use And Transport Integration in Scotland (LATIS) is a service offered by Transport Scotland to help with the appraisal of transport projects and programmes. LATIS aims to support robust evidence-based planning and the modelling and appraisal of proposed transport interventions. It can also be used to formulate and guide the deployment of transport, planning and the environmental policies.

If you are interested in using LATIS models, observed or modelled data, please complete a LATIS Request Form and submit it to latis@transport.gov.scot

For further guidance on the application process or subsequent support offered by LATIS, please refer to the Guide for Users.

Successful applicants will be required to agree to the LATIS Terms of Use which include:

  • LATIS models/data should be used solely for the purpose outlined in the Request form and should not be distributed to any third party without the prior consent of Transport Scotland and the LATIS Team
  • Transport Scotland and the LATIS Team stress that the release of LATIS data and models does not imply a tacit acceptance of the results and the implications of any test undertaken using the models. To this end, any report or documentation prepared by the model user shall include a disclaimer to this effect, unless the conclusions derived from the model results have been reviewed and approved by Transport Scotland and the LATIS Team
  • It is a condition of the application process that users complete a User Satisfaction Form following the conclusion of their use of the LATIS service or associated project work

If you have any queries about LATIS please email us at latis@transport.gov.scot.

Planning and Design Team
Major Transport Infrastructure Projects Directorate
Transport Scotland
Buchanan House
58 Port Dundas Road
GLASGOW
G4 0HF

LATIS Data

Data is an essential input to the process of transport and land use modelling. The quality of input data is a key determinant of the quality, robustness and value of the outputs. LATIS seeks to collect and use as much data, meeting high data quality standards, to inform model development and calibration and the wider processes of appraisal and monitoring/evaluation.

LATIS has a transport data collection facility which can be used by Transport Scotland, Scottish Government or Local Planning Authorities.

Observed data

The LATIS observed database includes a variety of travel and traffic data used for model development, calibration and validation. This data also permits a variety of analysis of transport demand, behaviours and allows us to better understand the transport system. The LATIS database includes:

  • Road Traffic Counts (volumetric and junction turning counts)
  • Public Transport Passenger Counts (boarding, alighting and occupancy)
  • Roadside Interviews (including origin / destination and trip purpose)
  • Public Transport Surveys (including origin / destination and trip purpose)
  • Journey Time Surveys

Model data

LATIS models can assist in the following fields:

  • undertaking appraisals of various transport and land-use schemes and policies
  • undertaking assessment and comparison of impacts of various planning programmes and policies and benchmarking against Government indicators
  • forecasting and testing of future land-use, demographic and travel patterns
  • undertaking environmental analysis, including projection of transport-based emissions
  • undertaking accessibility analysis
  • undertaking economic, financial and cost-benefit analysis

A wide range of model outputs are available, including:

  • operational analysis
  • environmental analysis
  • traffic emissions congestion
  • mapping demographic and land-use predictions
  • accessibility analysis
  • economic and financial assessment
  • accident analysis
  • sub-area analysis

Planning data

The LATIS service has a development planning appraisal capability which has been applied to a number of strategic and local development plans. In line with emerging needs and to meet our obligations under Planning Reform, LATIS can assist in

  • the creation of map-based plans showing the impact of proposed development upon transport demands and/or infrastructure
  • preparation of Baseline data or information to support appraisal
  • forecasting future travel demands for the purposes of development planning and management transport appraisal
  • provision of model outputs to appraise proposed development plans

The LATIS service collects and processes data from every Local and Strategic Planning Authority relating to land use allocations, permissions, completions, demolitions and re-development. This is known as the Assembly of Planning Policy Inputs process (APPI). This data is collected every two to three years but concerns a period extending to the short-term (5 years), medium-term (10 years) and long-term (20 years and beyond).

Using this data, the Transport, Economic and Land-use Model of Scotland (TELMoS) can provide independent forecasts of:

  • Population
  • Households
  • Employment
  • Office floorspace
  • Retail floorspace

These are available at TELMoS zone level, local authority level and national level. For more information, see TELMoS:12.

National Transport and Land Use Models

Transport models are built for a number of reasons, most commonly, to inform appraisal, design and planning decisions which determine the allocation of resources. However, they are also a resource in themselves; they offer a simplified representation that aids our understanding of the world.

Transport Scotland have developed a linked hierarchy of transport models- national and regional models- and a land use model which, applied together, provides a full Land-use and Transport Interaction (LUTI) modelling capability.

The national transport model, Transport Model for Scotland (TMfS) offers a generalised, multi-modal representation of travel demands and infrastructure supply for a base (2012) and future forecast years.

The national land-use model, TELMoS (Transport and Economic Land-use Model of Scotland), provides independent demographic, planning and economic forecasts which form the basis for future travel demands.

There are also a number of regional models associated with LATIS.

Transport Model for Scotland (TMfS)

TMfS is a strategic transport model, which provides a broad representation of transport supply and estimates of transport demand. The current version is TMfS:12 which has a base year of 2012.

The model:

  • covers the whole population of Scotland
  • details the choices made by people on how, where, why and when they travel
  • links with an interactive land-use model, the TELMoS, which provides a land-use transport interaction
  • is designed for broad option identification, ranking and scheme/policy appraisal
  • does not model the operation of junctions or congestion
  • is capable of modelling traveller responses to network wide road tolling/pricing
  • has a wide range of model outputs

The development of the models is underpinned by an extensive bank of transport data.

Reports relating to the National Models can be found in the documents, reports and guidance section.

TMfS:12

In 2013, an updated, strategic Transport Model for Scotland was developed, with a base year of 2012.

TMfS:12 and TELMoS:12, the linked national land use model, form the standard release version of the model.

In 2013, the previous base model TMfS:07 was updated.  This included the following:

  • Update the road and public transport networks; for example M74 Completion, M80 Stepps to Haggs, Airdrie to Bathgate railway.
  • Incorporate new roadside interview survey data.
  • Specifically focus on enhancement of the A9 corridor with disaggregation of the zones on this corridor for assignment purposes.
  • Update the travel demand to a 2012 Base year.

Along with the updates to the transport model, the Transport Economic and Land-use Model of Scotland was also updated to a base year of 2012 and uses the latest forecasts of land available for development based on planning policy inputs supplied by local authorities.

TMfS:07

TMfS:07 is more strategic than its predecessor, TMfS:05a. Key changes included:

  • inclusion of the Highlands and Islands into the main demand model
  • a reduction in the number of zones
  • a more consistent zoning system with equal importance given to both rural and urban areas with the zone system based on Census data zones
  • where possible all rail stations were in a zone on their own
  • representation of urban and interurban bus supply
  • a two stage public transport route choice procedure

This new approach provided a more proportionate distribution of zones between urban and rural areas and allows for quicker run times.

Further enhancements to TMfS:07 included a better representation of the road and public transport network (georectified network), High Occupancy Vehicle (HOV) modelling, Park and Ride as a separate mode in the demand model, and enhancements to TELMoS.

The revised model also benefited from the inclusion of a significant volume of new data including:

  • 2007-based approved Local Authority planning data
  • Integrated Transport Network distance data
  • 2005-2007 Scottish Road Traffic Database count data
  • the National Rail Travel Survey
  • Census Travel-to-Work data
  • inter-urban bus passenger origin-destination data
  • bus-based Park and Ride passenger origin-destination data
  • additional Roadside Interviews, including on port-access roads

Reports relating to TMfS:07 can be found in the Documents, reports and guidance section.

Transport and Economic Land-use Model of Scotland (TELMoS)

A land use model provides a view of future land use and a representation of the interaction between the pattern of land use and transport demand over time.

TELMoS:12

TELMoS:12 uses the David Simmonds Consultancy DELTA model, which “Seeks to represent the processes of change through which the decisions of actors in different markets bring about spatial development”.

The land use model has three key inputs:

  • Census 2001 data and demographic forecasts.
  • Employment and macroeconomic forecasts.
  • Forecasts of land available for development based upon planning policy inputs supplied by local authorities.

For any model run, the following are required:

  • Definition of a scenario (selection of economic and demographic forecasts).
  • Specification of the land use strategies to be tested.
  • Specification (and testing) of the expected responses of actors and markets.

The land use model, like the transport model, is incremental. It considers changes to the pattern of land use which result from forecast changes to baseline population and employment, given the availability of land for development. There is no baseline of land use per se. The next opportunity to calibrate the responses and forecasts of the model will be following the publication of Census 2011 outputs for Scotland.

The land use model provides key inputs to TMfS, the transport model. The interface is described in the TMfS demand model report.

Regional Transport Models

LATIS has adopted a model hierarchy approach and has developed more detailed regional models to supplement option development and scheme appraisal.

Model Software
TMfS:12 CUBE Voyager
TELMoS:12 DELTA software
SEStran Regional Model Cube Voyager
Moray Firth Transport Model SATURN, Cube Voyager
SEStran Regional Model SATURN, Cube Voyager

These regional models have a basis in the national transport model, sharing one or more of the following features:

  • Zoning system
  • Network representation
  • Base travel demands
  • Travel demand forecasting model

Regional models may be used for:

  • forecasting changes in traffic levels and public transport patronage at key points across the network
  • transport scheme appraisal
  • transport policy appraisal
  • Regional Transport Strategies
  • appraising regional development plans and local plans
  • more detailed operational appraisal (e.g. congestion of roads and junctions)

Strathclyde Partnership for Transport (SPT) have a multimodal transport model (Strathclyde Integrated Transport Model - SITM) and an integrated land use and transport model (Strathclyde Integrated Transport and Land Use Model - SITLUM) which covers the SPT region.

The first regional model to be developed through the LATIS service was the Forth Replacement Crossing Model. This was subsequently expanded and updated to form the SEStran Regional Model, by the South East of Scotland Transport Partnership (SEStran) with support from Transport Scotland.

A regional model of the Inner Moray Firth area (Moray Firth Transport Model - MFTM) was developed by The Highland Council with support from Transport Scotland to assist with the preparation of strategic and local development plans in the area and to appraise local transport interventions.

The Central Scotland Transport Model (CSTM12), has been developed by Transport Scotland.  It is a multi-modal transport model covering the main road and public transport network of the Central Belt of Scotland

Strathclyde Integrated Transport Model

The Strathclyde Integrated Transport Model (SITM) is a multi-modal transport model which covers the main road and public transport network in West Central Scotland. SITM was developed on behalf of Strathclyde Partnership for Transport (SPT). The coverage of the model is illustrated below.

In addition to utilising survey data to develop the transport model, SITM uses land-use and demographic forecast data from the Strathclyde Integrated Transport and Land Use Model (SITLUM) to develop the travel matrices. The base planning data is supplied through LATIS to ensure compatibility. The SITM contains road and public transport models and demand model processes, providing a forecasting methodology to predict changes in travel demand and transport costs over time.

The model is based on the SATURN suite for modelling the road network and the Cube TRIPS suite for the public transport network. The calibrated base for SITM reflects traffic and travel conditions in a 2007 Base Year. It can provide traffic forecasts on all main routes on the public transport network throughout the SPT area for a twenty year forecast period.

Visit the Strathclyde Partnership for Transport website

Forth Replacement Crossing Model

The Forth Replacement Crossing model was the first TMfS:07 regional sub-model. It was developed to assist in the design of the Replacement Forth Crossing. Coverage of Forth Replacement Crossing Model The model covers an area that extends from the Firth of Tay to the South of Edinburgh and from the East of Edinburgh to Stirling as shown in Figure 1. It was developed using SATURN and Cube Voyager software. The model reflects a 2007 base year, and contains a disaggregated zone system and a greater level of network detail. Note that the FRCM has been superseded by the SEStran Regional model.

SEStran Regional Model

The SEStran Regional Model (SRM) is a multi-modal transport model which covers the main road and public transport network in the East of Scotland. Geographically, the model covers an area that extends from the Firth of Tay to the Scottish Borders and from the East of Edinburgh to Stirling. The coverage of the SRM is illustrated below. Coverage of the SEStran Regional Model

The SRM contains road and public transport assignment models and park and ride and demand model processes. These provide a forecasting methodology to predict changes in travel demand and transport costs over time. The SRM also provides an appraisal tool that can be used to assess the operational, economic and environmental impact of transport schemes, policy proposals and development strategies.

The model was developed using SATURN and Cube Voyager software. The SRM reflects traffic and travel conditions in a 2007 Base Year. It also provides forecast year scenarios which predict transport-related impacts associated with various transport interventions and development plans.

Visit the SEStran website.

Moray Firth Transport Model

The Moray Firth Transport Model (MFTM) is a multi-modal transport model and covers the main road and public transport network of the Inner Moray Firth area around Inverness. The coverage of the MFTM is illustrated below. Coverage of the Moray Firth Transport Model

The MFTM contains road and public transport assignment models and demand model processes which provide a forecasting methodology to predict changes in travel demand and transport costs over time. The MFTM can be used to assess the operational, economic and environmental impacts of transport schemes, policy proposals and development strategies.

The model was developed using PTV VISUM software. The MFTM is calibrated and vaildated to reflect traffic and travel conditions in a 2009 Base Year. It also provides forecast scenarios which predict transport-related impacts associated with various transport interventions and development plans.

Visit the Highland Council website.

Central Scotland Transport Model

CSTM12 contains road and public transport assignment models and park and ride and demand model processes. These provide a forecasting methodology to predict changes in travel demand and transport costs over time. CSTM12 also provides an appraisal tool that can be used to assess the operational, economic and environmental impact of transport schemes, policy proposals and development strategies.

The model was developed using Cube Voyager software. CSTM12 reflects traffic and travel conditions in a 2012 Base Year. It also provides forecast year scenarios which predict transport-related impacts associated with various transport interventions and development plans

Software and Hardware requirements

The table below outlines software requirements for each LATIS model.

Software requirements
Model Software
TMfS:12   CUBE Voyager
TELMoS:12     DELTA software
SEStran Regional Model     Cube Voyager
Moray Firth Transport Model                                                     SATURN, Cube Voyager
SEStran Regional Model SATURN, Cube Voyager
Moray Firth Transport Model PTV VISUM
Strathclyde Integrated Transport Model (SITM) SATURN, Cube Voyager
Central Scotland Transport Model     Cube Voyager

Current transport modelling software requires high performance computer hardware. LATIS models using CUBE Voyager benefit from multi-core processors with a speed of greater than 2 GHz and a minimum of 2Gb RAM.

Apply to use a model

The LATIS models are available to use, subject to the receipt of a signed Terms of Use agreement and approval from Transport Scotland and relevant model stakeholders (for example, SEStran, The Highland Council or SPT).

Scottish Trip End Program (STEP)

The Scottish Trip End Program (STEP) is a software application that has been developed by Transport Scotland to enable the derivation of population, employment, households by car ownership, trip ends and growth factors based on data from the National Transport, Demand and Land Use Models.

In producing forecasts based on the National Transport models, STEP has an advantage over similar tools as it incorporates 'Scotland specific' data. STEP also includes a better representation of base year trip ends as they have been calibrated to reflect observed data across Scotland during the development of the National Models. 

STEP has been prepared for transport planning purposes. Specific uses could include informing on policy decisions and obtaining indicators on predicted changes in transport use over time.

It should be noted that forecasts such as those prepared by Transport and Land Use models are always subject to uncertainty. For guidance on how to manage uncertainty in transport forecasts, please see WebTAG Unit 3.15.5: Uncertainty in Forecasting.

STEP Terms and Conditions

Intellectual Property Rights

  • STEP is provided free of charge. However, the ownership and intellectual property rights (and copyright) of the STEP application, interface, data and procedures remain with Transport Scotland.
  • By clicking on the ‘I accept’ button during installation (or by otherwise installing or using the software), you acknowledge that you have read, understand and agree to be bound by the terms of this agreement.
  • Licenses.
  • The user shall have no license to copy or use any of the application, interface, data or procedures outside terms agreed with Transport Scotland.

Limitations

  • Transport Scotland shall not incur any liability under, or in connection with, this release of the STEP application, interface, data or procedures, to the extent that any failure to perform any or all of its functions has been caused by, or contributed to by, any force majeure event or circumstances beyond reasonable control of Transport Scotland.
  • The STEP application, interface, data and procedures are provided in good faith, and the user accepts full responsibility to satisfy itself of the accuracy, reliability and completeness of the information and no responsibility is accepted to any third party for the whole or any part of its content. No part of the contents nor any reference thereto may be included in any published document, circular or statement, nor published in any way without Transport Scotland’s prior written agreement of the form and context of such text.

[Need STEP webform]

If you have any queries regarding STEP, email LATIS@transport.gov.scot

Documents, Reports and Guidance

Model Documents

Commission Documentation

Other Documentation