This is only available after gaining at least 2 profile levels.
Once you are level 2, press
and scroll across to "Profile". In here you will find three sections, "Skills", "Player Progress" and "Challenges".
For this achievement we want to access the "Skills" tab. Once in here you will see a screen where you can allocate your hard earned ability points. You will want to put both ability points into the "Transport" section. This will then give you the ability to have the building materials store automatically load your vehicle with the goods that you buy (for a small fee).
Once you start another job (one which contains delivery of goods for building etc.) you will have the opportunity to use this newly acquired skill. As soon as you get the goods auto-loaded onto your vehicle, the achievement will pop.
If this solution requires any improvements, please leave a comment below and I will work on making it better. Happy Hunting.