exactly what I thinkRobertT wrote:They have monitors to track speed, I would think 50 over a narrow bridge is a bit of a speed anyhow. A vehicle doing 50 takes about 24 meters to stop, this includes 9 meters for a persons reaction time. So they are telling us that the lights of this vehicle do not shine more than 10-20m and this would probably have been on high beam as well, otherwise they would have had time to stop. So we either have a very poor maintained vehicle or a very poor driver who should not have been driving on those roads at night then.
all can happen in the park... and more by night