But there just isn't the demand for it, and the route is better served by the railway. Of those current two trains per hour, both of them continue on to Norwich and Skegness, so you'd end up with six trains/trams an hour, unless you're going to suggest we run a tram to Skegness instead?
Honestly I would probably cut the Skeggy train back to Grantham in Platform 3 in Winter, and run it through in place of one of the trams in Summer.
Or just run 2 trams per alongside with the existing trains.
The current timetable places the two trains only 15 minutes apart, so running two trams opposite them would produce a nice 4 train per hour timetable.
And "better served by the railway" which can't avoid repeated crush loadings, can't provide a proper half hourly timetable, let alone a quarter hourly one and renders public transport less than attractive for trips to Nottingham.
With the death of the Grantham high street I believe there to be major suppressed demand on the line.
And partial or total tramification would enable a station to be positioned in the housing estate immediately south of the tunnel entrance in Gonerby Hill Foot, after all the entire area between Great Gonerby and Barrowby is chalked up for development.
Considering the cost of a tram stop in journey times is drastically under a minute thanks to the relatively low speeds and absurd accelerations then stops serving villages becomes a less absurd prospect.
Any lengthening of journey times would be more than offset from time savings from the doubled frequency to 4 trams/trains per hour.
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Bingham to Grantham (exclusive) has no more than villages, which could probably justify an hourly stopping service but no more than that.
Bottesford is a bit on the big side for a village, several thousand people. Considering the low cost of stopping electric high acceleration vehicles there it would probably justify multiple vehicles per hour.
And better public transport does have a developmental effect. Even Aslockton would probably justify trams stopping given the very short time it takes to stop with an all axles motored vehicle.
In terms of generating modal shift hourly trains have been shown to be effectively worthless. Perhaps it would be better to just cut them all to Parliamentaries and admit that it is not considered worthwhile to serve them properly.