Hardware is bought by whoever maintains the road, which is why it changes at a border and hardly anywhere else. Bollards and guardrails are the two pieces of it visible in almost every shot, and these trainers drill the designs that separate one country, or one German state, from the next.
3 games, free and without an account, playable in the browser.

Can you guess which countries use each of the three guardrail types?

Which German states build with the A profile, and which with the B?

Can you guess which countries use each of the different bollard types?
Every game here is also in the full catalogue, which is the same list without a cut taken out of it.