What is the SAFEST way to drive double clutch or floating

I'd say floating is both safer and more efficient. The less the driver is moving around in the cab, the more energy they can devote to driving the truck. Double clutching is just a waste of friction material.

 

Neither is safer. You should be able to double clutch, for safety reasons, some situations it is better to do it. Floating is more convenient, perhaps easier on the clutch, harder on the gears if your are less than perfect in your timing. Either way if a company wants you to be able to float and you can't, move on and find another company.

 

Again, I'd advise you just move on. No need to burn bridges, you never know what may happen in the future.

 

Floating


But these
UltraShift PLUS Linehaul Series Heavy-duty Transmission - Vehicle - Eaton

It's the wave of the automated trucking future

 

I float in low range double clutch in high side

 

Mr safety will tell you the cdl book says to never ever shift going downhill. Or in an intersection. Or over a rail road crossing. Or while making a turn. Heck its got so many times of when not to shift its amazing we ever get out of the low side of the tranny.

Double clutch, single clutch, float. None of them are any safer than any other.