[jimmyvalmer]

If you mean setting up streets like the Monaco Grand Prix, you're in for a treat. Nothing inflames the male urge to nail the throttle like a hairpin turn or dangerous looking street "berm". Congestion pricing would be my first-order solution. Fewer cars fewer accidents is inarguable.

[huebomont]

The data disagrees. Narrowing streets, adding vertical elements to the edges of streets, and removing lanes works. Congestion pricing helps too!