Road Vehicles and Roads

It would be more realistic if say buses were only allowed to travel at 30mph in towns.
Traffic should be simulated in towns with the amount of traffic being proportional to the population of the town.
Local Authorities should from time to time decide to build a road between their town and a nearby town, for use of private cars.
When two towns are connected by a road, the demand for public transport should be slightly reduced as a result of people making private journeys. However, if you own the road you could introduce a toll (at risk of upsetting the Local authority) to keep the demand for public transport high. (Toll income should be negligible)
Like trains you should have to pay maintainance for roads, which is proportional to the quantity and speed of vehicles travelling on it.
In very large towns local authorities should have the power to implement tolls on vehicles travelling into/through the town center.
You should be in charge of some road signs, for example setting a speed limit just before a bend. However, if you set no speed limit a bus might take the corner at 70mph, causing a risk of crash.
Also on busy roads you might want to be able to select no overtaking because overtaking could be a big source of potential crashes, at the moment it doesn't seem to mind for two road vehicles to go through each other.

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