When constabulary duty’s to be done,The policeman’s lot is not a happy one.
—Pirates of Penzance, Gilbert and Sullivan
Imagine a long, straight stretch of high-speed, two-lane road that is routinely monitored by the state police for accidents.1 There are many different ways that we can imagine how this monitoring could be implemented. For example:
(a) A police patrol car sits on a side of the road at the midpoint of the road, waiting for a radio call request for aid at the scene of an accident;
(b) A police patrol ...