amenities etc. which generate traffic.

I don't like "hub" in this context since it smacks too much of facilities (etc.) designed to function as hubs, notably in transport and logistics (as well as IT).

Here I take it we are talking about large shopping centres, sports facilities, business districts, etc. around which traffic will be particularly dense at times.

I'd also argue with the French since these infrastructures (etc.) do not actually generate traffic, not directly at least. I'd say they concentrate it or, of you want to retain generate, that they generate (motor) traffic congestion.

Looking at a business district for instance, the traffic will be generated in any case, since people have to go to their place of work, wherever that might me (even dispersed). If anything, a properly designed facility of the kind addressed (I assume) should, if it is given all due attention and accompanying work, actually reduce (motor) traffic, assuming appropriate means of public transport are set up.

Fuller context might help refine the translation solution.