im one of those people who make highways across the countries of the OpenTTD continent. and would like to suggest some new features for roads.
- ability to set maximum speed for one-way and two-way roads (done in configuration settings screen)
- pathfinding adjustment so vehicles prefer one-way roads/higher speed limit roads (thus they would be more likely to use highways to get somewhere while there is a faster non-highway route available)
- toll booths(possibility, specially for those who want to be jerks on multiplayer, or just bully the ai)
- make vehicles use both lanes of a one-way road(usefull for when there is a large line of vehicles and one of the first break down, now most of them wait behind the broken down one till its moving again)
- make more suggestions if you want and ill add it to the list.