Woah - The Trondheim ski-tow is a liability! plus of course it is only any used for solo bikes ridden by fairly fit people with 2 normally functioning legs.
20 years ago Bristol were getting all enthused about Park Street and Edinburgh slightly interested for Dundas Street. It was noted that as well as the disruptive costs of digging up roads and installing, there would be a maintenance costs of cleaning out the slots etc with an indicative figure of £1000/metre/year
For the Bristol Park Street budget I worked out that for around a fifth of the cost, 2 secondhand totally low floor minibuses could be purchased and set-up to operate a shuttle service as a roll-on roll-off facility for all who might struggle going up AND coming down the hill (wheelchair users especially). The service could have a nominal fare paid off-bus, to avoid boarding delays, or be free to use - with the potnetial for the service to be branded (for Dundas Street perhaps Standard Life/Aberdeen Asset Management?)
The nice additional details are that there would be no interrupted operation of the cable running to handle road crossings/traffic signals and the service could start immediately with no major road works. A fairly simple route with a roundabout at each end (Cannonmills & George Street), and the option to have all electric vehicles
Ro-Ro bike buses would have been an even better solition than the Tunnel Bike Bus that Merseyrail operated when the Liverpool City Loop was closed for rebuilding (after 40 years), and might even have a place at other locations.
The Forth and Tay Bridges are also challenging for the non committed and the RoRo option is one possibility, but the frequency of regular coach services (with hold space) and buses wth off-peak space in the saloon. Funding might support this as a trial to establish such measures as demand, operating costs of all types (financial, time, vehicle numbers and designs..) and from that refine the delivery to a sustainable one.