GBATS4M Model Update METROWEST Highway Model Local Model Validation Report Prepared for West of England Authorities 08 October 2015 1 The Square Temple Quay Bristol BS1 6DG Document History GBATS4M Model Update METROWEST Highway Model LMVR West of England Authorities This document has been issued and amended as follows: Version Date Description Created by Verified by Approved by 1.0 17.10.2014 Initial Draft Report Pete Knightbridge 1.1 14.4.2015 Draft Report Pete Katherine Chris Bushell Knightbridge Williams 1.2 08.10.2015 Final Report Pete Katherine Chris Bushell Knightbridge Williams 2 | PAGE Contents Section Page Introduction ................................................................................................................................ 6 1.1 Background ................................................................................................................................ 6 1.2 Report Structure ........................................................................................................................ 7 Model Usage and Design Considerations ...................................................................................... 8 2.1 MetroWest ................................................................................................................................. 8 2.2 Potential Further Uses ............................................................................................................... 8 2.3 Model Design Considerations .................................................................................................... 8 Model Standards, Criteria and Acceptability Guidelines .............................................................. 10 3.1 Overview .................................................................................................................................. 10 3.2 Validation Criteria and Acceptability Guidelines ..................................................................... 10 3.3 Convergence Criteria and Standards ....................................................................................... 11 3.4 Trip Matrix Changes ................................................................................................................. 11 Key Features of the Model ......................................................................................................... 13 4.1 Source Model ........................................................................................................................... 13 4.2 Modelling software .................................................................................................................. 13 4.3 Base Year .................................................................................................................................. 13 4.4 Model Network Area ............................................................................................................... 13 4.5 Time Periods ............................................................................................................................ 15 4.6 Pre Peak Queuing ..................................................................................................................... 15 4.7 Zoning System .......................................................................................................................... 15 4.8 Signal Timings .......................................................................................................................... 17 4.9 User Classes ............................................................................................................................. 17 4.10 Assignment Methodology ........................................................................................................ 17 4.11 Representation of Car Parks .................................................................................................... 18 4.12 Generalised Cost and Parameter Values ................................................................................. 18 4.12.1 Values of Time ......................................................................................................................... 18 4.12.2 Vehicle Operating Costs ........................................................................................................... 19 Survey Data ............................................................................................................................... 20 5.1 Overview .................................................................................................................................. 20 5.2 Roadside Interview Sites .......................................................................................................... 21 Sample Size and Logic Checks .................................................................................................. 21 5.3 Traffic Counts on Cordons and Screenlines ............................................................................. 22 5.4 Data Processing ........................................................................................................................ 27 5.5 Journey Time Surveys .............................................................................................................. 27 5.6 Accuracy of Journey Time Surveys ........................................................................................... 28 Network Development ............................................................................................................... 30 6.1 Source Networks ...................................................................................................................... 30 6.2 Link Coding ............................................................................................................................... 30 6.3 Junction Coding ........................................................................................................................ 31 6.4 Centroid Connectors ................................................................................................................ 31 GBATS4M HIGHWAY MODEL LMVR Trip Matrix Development ........................................................................................................... 32 7.1 Matrix Development process .................................................................................................. 32 7.2 GBATS3 Matrix Merge ............................................................................................................. 32 7.3 RSI Data ................................................................................................................................... 33 7.4 Merging RSI Data ..................................................................................................................... 33 7.5 Calibration of the Initial Trip Matrices .................................................................................... 34 Network Calibration and Validation ............................................................................................ 35 8.1 Network Calibration ................................................................................................................ 35 8.2 Route Choice Calibration ......................................................................................................... 35 8.3 Route Choice Validation .......................................................................................................... 36 Trip Matrix Calibration and Validation ........................................................................................ 37 9.1 Prior Trip Matrix ...................................................................................................................... 37 9.2 Application of Matrix Estimation............................................................................................. 37 9.3 Changes due to Matrix Estimation .......................................................................................... 37 9.4 Park and Ride Matrices ............................................................................................................ 39 9.5 Further Trip Matrix Segmentation .......................................................................................... 39 Assignment Calibration and Validation ....................................................................................... 41 10.1 Overview.................................................................................................................................. 41 10.2 Cruise Times ............................................................................................................................ 41 10.3 Traffic Flows ............................................................................................................................ 43 10.4 Journey Times .......................................................................................................................... 49 10.5 Model Convergence ................................................................................................................ 50 10.6 Stress Test ............................................................................................................................... 50 Conclusion ................................................................................................................................. 51 11.1 Overview.................................................................................................................................