RAILS

4. To use too much of something, or use something badly, when there is a limited amount of it
6. A steel bar or continuous line of bars laid on the ground
7. A tunnel under a road
9. A railway designed for use by trams or wagons
10. A main road, especially one connecting major towns or cities
12. Any machine which travels on roads suck as cars, busses, etc
14. A series of railroad cars moved as a unit by a locomotive or by integral motors.
18. It consists on a single Rail, typically elevated
20. The action of moving someone or something to anotehr place

1. A system of vehicles, such as busses and trains, which operate at regular times for public use
2. When to many vehicles use a road network and it results in slower speeds, or no movement at all
3. A substance like gas or coal which produces energy which it is burnt
5. A person who is travelling from one place to another, and isn't driving, or working on it
8. A rough path or minor road, typically one beaten by use rather than constructed
11. The place where someone or something is going
13. To join two things or places together
15. Useful; suitable for the situation it is being used for
16. Something, typically a process or device
17. A wide way leading from one place to another
19. The activity of designing and building things, like bridges, roads, machines, etc.