Nieuwegein municipality is keen to improve the environmental performance of its vehicle fleet and asked CE Delft to carry out an audit. The aim was to improve understanding of current performance and assess the costs and benefits of investments in alternatives to improve it. The following alternatives were examined:
- Phased replacement of all vehicles.
- Accelerated depreciation of all vehicles.
- Particle traps on diesel vehicles, combined with a switch to biodiesel.
- Phased replacement of all vehicles by natural-gas vehicles.