Quote:
Originally Posted by chowhou
There is one big benefit in that they can run 100ft trams while we max out at 60ft articulated busses
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That's true, and comparing costs the CAPEX works in favour of trolleys but the OPEX through reduced drivers & fleet maintenance likely tips things in favor of trams over time.
For example, a 100ft Flexity Freedom for example costs about $5M to $6M and the cost of an articulated trolley is probably in the range of $1.5M to $2.0M. Anywhere from $1M to $2M per unit. Assuming both require overhead wiring that costs approximately the same. We're left with the costs of track installation which for which, lets assume $2.0M per km, about $1M per km to repave the roads and about $1M per km to install the tracks.
Operating costs, assuming about $0.5M per year for maintenance and operator salaries per vehicle. So a net savings of $0.5M per Flexity Freedom on operating costs per year.
To convert all 160km of Vancouver's trolley network to trams that'd be $320M+ in extra capital costs over trolleys for the trackwork alone. With a fleet of 262 trolleys (assuming all are upgraded to articulated, so 131 Flexity Freedoms required), you're spending about an extra $131M to $262M on purchase costs (assume $200M extra for ballpark middle ground figure).
With 131 trams in this example, you'd be saving approximately $65.5M per year on operator & maintenance costs, and to repay a capital cost of $520M on an undiscounted basis, it would take approximately 8 years.
A detractor for trams in this scenario is that frequency would be reduced by half on all routes, which is something that drastically improves the viability of a route, in addition to the other obvious technical benefits of trolleybuses you had mentioned.
Considering a 12-km network of (mostly) greenfield streetcars/trams (fleet of 18) was quoted to the city at ~$1.1B, I'm also being very generous in this example towards the trolley to tram conversion possibility.
https://dailyhive.com/vancouver/downtown-vancouver-false-creek-streetcar-route-map
Conclusion: I still think trolleys are the better option and capital funds should be used for grade separated rail (i.e. Skytrain).