In your VEERA builded bus body my seat was 1st single upper berth.
For 1st single berth, upper & lower, the berth is designed slightly short near the cabin inner door, near the passenger legs space.
While my night journey I had to constanly control my legs, so that, they don't get sandwhiched in the door, while its closing.
The shorthning of door is probable not an optimum solution, while an solid steel partition can be welded such that it ensures the passenger legs remains inside the berth area,
And further avoiding any passenger leg injury..............