In message , at 11:16:16 on Tue, 4 Jul
2017, "Dave Plowman (News)" remarked:
In article ,
Roland Perry wrote:

Almost every situation has both primary and secondary safety. You check
that car brakes work, but you also provide seatbelts and airbags for
when they don't.

Don't be silly. The number of road accidents due to brake failure is tiny.
And pretty well every modern vehicle has dual circuit brakes anyway.

The latter is a way to increase the primary safety, and annual MOT tests
rub that home. The lack of brake failures is a success, not a problem.
--
Roland Perry