Vehicles do not spawn in Push after capping A

I am going to assume this is a bug. If you made such massive maps with roads on the outskirts then I expect them to be use them, but so far I don't see any vehicles respawn after capping A.

Is this intentional or a bug?

This is intentional. Push is made for on-foot combat and the vehicle is there to help attackers with first spawn as defenders spawn on the actual point.