While traveling home we experienced a flat on the 10frwy, due to saftey concerns the CHP demanded we move from the of-ramp. At that time the tow/assist vehicle arrived. That was a timely response, After reaching the surface street,the driver relocated our large stack of stuff in the rear of vehicle and quickly removed and changed the spare. He was also very diligent and found the spare to be low on air pressure. He suggested and followed us to a nearby station and aired up our tire.This was a true professional,sadly a rare thing today.