The phrase used by all bus operators is dead mileage. This is when a bus is running between the depot and the start of the route and therefore not earning. The bus companies do everything they can to keep this as low as possible, especially at 5 miles per gallon.I have never been a devotee of public transport and haven't been a regular bus user in donkeys year however something that was evident in the 80's in Middleton seems both universal and evident still today. Thats the obligation placed on bus operators to run the wrong vehicles for certain times. I am thinking of when I lived on Grimshaw Lane and the 80 went past but its the same up here in North Yorkshire now still. Thats the requirement to run "full sized" buses whatever the time of day. I'll stick to the 80 but it applies round here now - rush hour morning and tea time the bus was full and most stops had people waiting for them - after 7pm they were still obliged to run double deckers that were all but empty ! Why? Surely it would be more cost effective to run a service off peak using vehicles in realistic numbers plus kinder to the environment? Some times a Transit mini-bus would have been enough but no a double decker with a guy coming home late from work and 2 youths on the way to a pub aboard rumbled and belched past regardless. In this day and age what about EV small buses off peak? If there is a rush easy enough to communicate with a central location and increase the service surely? Once every 15 mins rather than once an hour for an hour or so to meet demand? Just seems to be something that all the stake holders talk a good talk in but walk the walk they were walking in the 60's or 70's?
A double decker costs north of 130k. It leaves the depot at 6.30 and does not return until 11pm. Driver change overs are done in the town centre.
If they were to be taken off the road after rush hour your dead mileage is doubled. It would not be cost effective to have a bus running for 4-5 hours a day. Throw in the fact that Londons model is bus operators are only allowed buses under 3 years old !!!
Then you have to buy a whole new fleet of smaller vehicles to do the day time running. Again there is dead mileage and you need someone to take the bus to the change over point. That is extra cost for the dead mileage and drivers. (What do the drivers do for the rest of the shift once they have swapped the vehicles)
If you double your fleet where do you store them all ? Every depot I went to was rammed and I did the length of the UK.
In principle what you say is great but in practice it is not a working model.