Use the comfort graph in the convoy's information window to see the actual comfort level, which takes into account overcrowding.
That's exactly the point.
My trains running on IC2 line (Bridgewater) have a capacity of 288 + 134 overcrowded.
An empty train (no overcrowding) got a comfort rating of 23.
A completely overcrowded train got a comfort rating of 21.
A class 2 passenger travelling 18km at an average speed of 45 km/h (which results in the comfort critical journesy time around comfort 20), will pay
- 4.33 @ comfort 21
- 4.34 @ comfort 23
- 4.34 @ comfort 255
- 4.31 @ comfort 1
I'd really call this negligible! It's simply not worth adding capacities to fight the overcrowding, as long as passengers don't pile up at the stations.
Same was figured out on much higher distances of ovesea shipping lines.
I was considering to use more comfortable steam ships instead of the sailing ships, but rejected this.
Prominster-Anningdale is a distance of 480 km. The fastest ships at the moment are 20 km/h fast, so I assumed this to be the average speed.
A class 4 (very high) passenger will pay
151.93 @ comfort 1-214
153.53 @ comfort 215-223
155.12 @ comfort 224-232
156.72 @ comfort 233-241
158.32 @ comfort 242-249
159.92 @ comfort 250-255
In practice, exactly one ship with a comfort level of 222 is available, but it's not really worth it. Only the 30 walthiest people can enjoy that comfort, so I get an additional revenue of 95.70. That's negligible, given the ship got an impressive capacity of 710 passengers.
It's simply not worth bothering about those few cents you may or may not earny when offering a better level of comfort.
This especially applies to overcrowding, as you usually won't lose much comfort.