The technique for the last is neat. Cool idea - cool effect! I like that.
I am not too fond of the very bright nighttime pics which no longer look like it was night ... and some of the light trails from the cars are too bright, too, overpoweringly bright, as it were (3). Although photography means "painting with light", sometimes less is more, I think.
if the first one was a daytime shot, I would call it severly overexposed.. so I guess it must be the same for a nighttime shot just try some shorter exposure time