I don't think the police typically ticket you for going 30mph when the speed limit is 25mph, or for going 65mph on the highway when the speed limit is 55mph. I

I don't think the police typically ticket you for going 30mph when the speed limit is 25mph, or for going 65mph on the highway when the speed limit is 55mph. I live near Boston, and if you drive at 55mph on I-93 or I-95 when you can drive faster, you will just irk other drivers. The de facto speed limit is higher than the posted speed limit, and city officials, the police, and drivers know it. "During the 10-day study period, we observed vehicles speeding up to almost half (47%) of the time, including instances of extreme speeding with cars going more than 25 mph over the posted speed limit. This shows a disturbingly high percentage of people ignoring the posted speed limit and putting themselves and others at risk."