[jdh]

I am sure you are right, but as a long time resident, I think this is the trees not the forest -- I would estimate these barriers reduce 95-99% of the car traffic through them, even if someone cutting through is indeed a daily occurrence. Most are quite intimidating, many are totally impassable or require significant ground clearance.

[hx87]

SUVs and crossovers are becoming more popular by the day, so this might be more of a problem than people imagine. I wonder if there is a way to discourage cars with high ground clearance--a rollover hazard, perhaps?