Very interesting regarding ferry services
Them ferry service numbers are staggering, considering the other options of the railway and the Mersey tunnel
Regarding 'G'. Why was the ferry still used for motor vehicles?
Was it cheaper than a passage through the tunnel?
As it says , 40% was horse drawn traffic which was not allowed in the tunnel; also I suspect there would have been quite a few drivers who would have felt nervous in a long underwater tunnel. According to the schedule at 'G', only 15% was private cars.
As far as cost goes, I can't find out what the toll for a car was when the tunnel opened, all I can find out is that the goods ferry toll in 1905 for a four seater car was 1 shilling: using the relative RPI, that equals nearly five pounds today. Larger cars were charged between 1/6d and 3 shillings. The tunnel toll for a car in 1971 was 10p.
The luggage boats finished in 1941.