Road engineering
- 93/93.080/93.080.01 Road engineering in general
- 93/93.080/93.080.10 Road construction
- 93/93.080/93.080.20 Road construction materials
- 93/93.080/93.080.30 Road equipment and installations
- 93/93.080/93.080.40 Street lighting and related equipment
- 93/93.080/93.080.99 Other standards related to road engineering