Are you proposing to construct a new bus only road between the tip of Botanic Drive and Frome Road?
Yes.
You'd also have to upgrade Botanic Road, Frome Road and Frome Street.
Why would Frome Road and Frome Street need to be upgraded? All that needs to be done, literally, is to mark the left hand lanes either side, with 'Bus Only 7am - 7pm' exactly as they have done on Currie and Grenfell streets.
Botanic Road would be the tricky one. Currently it's one-way eastbound & there's a hell of a lot of parking on both sides, which would no doubt cause an uproar if they got removed / reduced. I think the ideal solution would be to construct a new bus-only road, along the same alignment, in both directions south of Botanic Drive. The loss however would be taking away 6-8m of parklands to accomodate this - assuming 2.7-3.0m width bus lanes, kerbing, and minor landscaping treatments. The bus lanes would cross over Botanic Drive just outside the Zoo.
Also goodbye to holding any events in Botanic Park?
Why? There's absolutely no reason why events couldn't continue to be held in Botanic Park. If anything, the provision of a bus lanes through the area would only serve to enhance the attractiveness of Botanic Park as an events space, thanks to improved accessibility by public transport!
The above would surely cost no more than $20m at most. All you are really doing is cutting down a few trees to make way for the new lanes, laying down asphalt, kerbing and painting new lane markings on Frome Street & Frome Road.
Happy for this post and other(s) to move to Visions & Suggestions thread.
Any views and opinions expressed are of my own, and do not reflect the views or opinions of any organisation of which I have an affiliation with.