Alistair J Murray
When God made Truck DriversWhen God Made Truck Drivers" Author Unknown (modified for UK) When the Lord was creating Truck Drivers, he was into his sixth day of overtime...
That isn't always possible when for example you are making a right turn through a central reserve gap of a busy non-motorway dual carriageway. The CR deceleration lanes around here are not generous at 70+ mph.
If a vehicle is closing that fast it is usually a rep mobile and comes directly from L3 at 45 degrees narrowly avoiding clipping other vehicles in L2 & L1 and making full use of the region of hatched white lines just prior to the junction.
Although I prefer to have such drivers in front rather than behind it isn't always practical. And once you have a right turn indicator showing they are free to pbutt on the inside anyway.
In answer to the OP's question: signalling soon after pbutting the 300m marker is about right at motorway cruising speeds. Although on some fast non-motorway dual carriageways you have to watch out for ambiguities when some traffic "planner" has put a lay-by between the 300m marker and the deceleration lane for the junction turn off. In this latter case signal a left turn after you clear the lay-by.
Regards, Martin Brown
