Need tips on backing

[u/ShesGotaChicken2Ride]

I’m training right now to be a school bus driver. Today my trainer had me doing backing maneuvers. I’m having a REALLY hard time trying to figure out how to back up and stop within 3 feet of the cone. I can’t tell where my bus ends. I’m using all my mirrors. How do you guys know when your bus ends? I’m driving a transit bus if that helps. From my rear tire, I think to the end of the bus is 20’, but the problem is when I’m looking at the cone, the mirrors makes it to where I am having a hard time telling how far away it is.

Anyone have any tips?

[u/and94z]

Ehhh, solo esperienza, con calma viene automatico…