Yeah, at night on 1604 I usually just set the cruise control on 72, and if some idiot wants to go faster, he can wait until the right-lane clears so I can get over.
And 281 is no place to do any speeding, especially north of 1604. That traffic nightmare is always a pain in the rear no matter what time it is. Maybe once the toll road gets built
But trust me, not speeding in these cars is a tough task for anyone, even SAPD officers <cough> Doug <cough>