You couldn't increase it to more than hourly without redoubling which will shoot the cost of any project up. To make the Kirkham connection acceptable, there would need to be a tram-train connecting off of every single Blackpool North service. Unless combined with a Fleetwood branch reopening, Tram-trains would also be unnecessary when there's a perfectly usable main road that the tram can run along.
As another member has said, passing loops would be much cheaper to deliver if built to tram train spec, and trams driven on sight (similar to the system on Metrolink) can vacate sections faster with faster acceleration and less investment in complex signalling.
Remember that there's also 1 more path Preston to Kirkham (and potentially into Blackpool North) freed up if you convert the South Fylde Line to tram-train operation, so frequent tram train connections into Preston wouldn't be that difficult.
The main road along the sea front is currently quite congested, a more frequent tram service would encourage modal shift onto public transport, especially with stops at Saltcotes for the schools and a park & ride stop at Wrea Green with a shuttle bus to Warton Aerodrome (a major employer in the area).
If the major road is free of traffic congestion, then a bus is probably a better option than a tram. If it's congested then there's no point in putting a tram along it that would just get stuck in the same jams. Either way a tram shouldn't be using a main road for any significant distance.
Exactly - there are already several buses an hour between Blackpool and Preston via Lytham and Warton, with even more operating on the Blackpool - Lytham section. They don't make enough of a dent in congestion.
Tram trains wouldn't be necessary if such an extension was not shared with mainline trains.
Unfortunately the junction design at Kirkham and Wesham means it would be difficult to avoid sharing track with mainline trains, and this would be quite expensive to rectify.
One issue with tram trains is platform height. You either have them with low floor like Sheffield and therefore have to build custom platforms at heavy rail stations or you have them high floor which means all your platforms on the tram network need to be high as well
The Sheffield solution would probably be best if you only used the Squires Gate to Kirkham section (which would be the most cost effective upgrade anyway). Low floor platform extensions at each station and new low floor platforms for the few proposed new stops would make a lot of sense.
I wonder how many vehicles use Amoundrness Way on a daily basis currently.
Thornton A585
At the Thornton roundabout, AADF (Average Annual Daily Flow) is around 20,000 motor vehicles.
Data for other points is available on the site too, but 20,000 is quite a high AADF for a single carriageway road, which is partly why the reopening is needed in some form.