EEM1 (road infrastructure) Appendix 2 - Traffic data
Summary
This appendix provides standard values for traffic composition (based on the vehicle classes listed below), vehicle occupancy and trip purpose. Guidance is also provided on measuring and estimation traffic volumes, traffic growth and speed.
- A2.1 - Traffic data
- A2.2 Traffic composition
- A2.3 - Separating the project into its component sections
- A2.4 - Dividing the year into time periods
- A2.5 - Vehicle occupancy and travel purpose
- A2.6 - Traffic volumes
- A2.7 - Traffic growth rates
- A2.8 - Future traffic volumes
- A2.9 - Travel times and speed
- A2.10 - References
A2.1 - Traffic data
Introduction
This appendix provides standard values for traffic composition (based on the vehicle classes listed below), vehicle occupancy and trip purpose. Guidance is also provided on measuring and estimation traffic volumes, traffic growth and speed.
These procedures can be used to provide traffic data for:
- the procedures in appendix A3 for estimating travel time
- in the absence of measured data or
- in the absence of data from calibrated and validated transportation models.
Use of measured data
Wherever practical, measured data shall be used in preference to the default values given in the tables.
