Stop! That's Enough.
Observed in Caernarfon, North Wales, 20 September 2007.
This is a Welsh police car, pulled in opposite Caernarfon Castle. All the police cars, in Caernarfon at least, conform to this new pro-active design.
The traffic sign logo on the bonnet, in stop sign format, reads "that's enough". The officers told me it was intended to refer to anti-social behaviour among other things. It will probably need more than a sign on the bonnet to catch the attention of some of the guys they are after, unless that is, they intend ramming them as well.