Whilst only a minor improvement I think it would be nice to see longer compressor run times in the game, currently the compressor will run for a few seconds because air builds up so quickly. In reality, the compressor will run for at least a minute or two (depends on the type of train and so on). The compressors on the trains I work on, run for a minimum amount of time (by opening a valve) to prevent the compressors running for too short a time, as it can cause a build up of water. The main improvement it would give the user is the sound immersion of the compressor running.
