> In Lisbon we could easily double or triple the speed and amount of traffic flow without any investment by getting rid of a few thousand spots of street parking.
Agreed, but surely the best arrangement in a dense, traditional city centre is not to have high speed traffic at all except on a few large thoroughfares, and to reserve most other streets and alleys to pedestrian use.
I agree with you but high speed is very relative. I'd be happy to have a 30-50 km/hr limit across the city and no city streets/avenue with more than two lanes of traffic, certainly not advocating for more than that. What I'd love to have is a continuous flow of traffic at low speeds instead of stop-and-go for an hour to get 10 kms across town.
