[CzechTexan]

These aren't the normal stock bridges that will show up on the 2-D map. They are just like stationary objects such as a house or vehicle you might add on to the map. They may not be viewable from a distance and you might have to get closer to be able to see it.
Many of the roads at river crossings do not have bridges since ferries are often used for that.
Railroads do have bridges so look for those to see if you have bridges.