against the inequity of the speed bonus
In real life you find high speed trains with less capacity for the long range transportation and slower trains with higher capacity for the short range / commuter service.
Due to the rising of the speed bonus with the appearance of faster vehicles, the urban commuter systems become unprofitable.
As I understand the speed bonus, it should force the companies to invest in fleet modernization.
A modern simutrans pak64 commuter service nowadays is performed by Panteress and Tigress I/II, which are much more effcient (too low costs + speed bonus) than the proper BR185 / TPI Lopomo trains.
My suggestions to get back to useful lower speed traffic:
1) fair payment, part 1
- Replace the speed bonus with (operation independent) maintenance costs, which increase with the vehicle age.
A newly bought vehicle doesn't need much maintenance. But with each covered kilometer/mile and with each year of standing in the rain, the vehicle needs more subsistence money, even if it does not move. Compensate the maintenance costs with slightly lowered operation costs.
Additionally this will force the companies to purchase more precisely and keep their fleets as small as possible.
To help the companies to keep track of the growing costs, the vehicle list should become sortable by age and margin.
2) fair payment, part 2
And please raise the costs of Panteress and Tigress I/II 5 to 10 times.