A Monaco datapoint
From Star Sports’ coverage of the Monaco Grand Prix (by far the most awesome setting of any GP, sorry Melbourne):
_The widest point of the Monaco street circuit is narrower than the narrowest point of the Singapore street circuit.
And the maximum speed on this insanely narrow circuit is about 290km/h.
**Update: **Lewis Hamilton wins it, after starting from third place on the grid - and after ripping one tyre off its wheel early in the race.