change arrival times?

I was wondering if there was a way to increase the arrival time for the I go primo?
I drive truck and my first day using this even with going above the speed limit pretty much the whole way I was still later then my first posted arrival time.

Can I increase by 5%-10%?

Thanks

I assume you have set primo to truck mode?

change max speed in truck mode to 52mph as most trucks say you going 56mph but actually going about 54mph

I use primo for truck and usually arrive ahead of my first estimated arrival time (unless I get stuck in traffic)