I had to hook the caravan up to wash the dust off yesterday so decided to take it out onto the highway for a brake test. Now I didn't do a full on emergency stop but from 70 kmh anchored pretty hard and pulled up in about 75 metres. Did that twice. This was on a straight flat stretch of the Great Eastern Highway, no traffic around.
Of course this didn't involve any reaction time as I decided when to brake, and that is the concerning issue that Ian has drawn my attention to. I usually stay at 90kmh or less when towing the 'van, much to the annoyance of other road users,
Bueller, you will probably be conversant with the stretch of road where the original incident occurred, Toodyay Road between Northam Rd and Clackline Rd turn offs.
Cheers,
Geoff.