This catalogue presents a set of commonly design errors and suggests a range of measures to overcome them; it also gives an indication of the comparative countermeasure costs to facilitate prioritisation of the work. The catalogue can be used both as a proactive safety tool to ensure the design faults do not arise in the first place, or a reactive safety tool to assist in designing cost-effective countermeasures where problems already exist on the road network.

The situations considered are organized within 8 groups:

1. Function
2. Cross Section
3. Alignment
4. Intersections
5. Public and Private Services
6. Vulnerable Road Users
7. Traffic Signing and marking
8. Roadside Features

For each case, a sheet is presented with several illustrations.