People and machines using gates can leave a path for wallabies. Set those gates up very well.
This fence has a concrete base and an automatic opening & closing mechanism. These are a worthwhile investment to get the full value out of a wallaby fence.
Rubber can be effective but don’t make it too hard to open and close the gate.
Not swinging the gate on hinges is an option. Just sit it on the ground, tied up with wire, leaving no gap underneath. Additional note - there are smaller gaps in the mesh in the bottom of this gate, Larger gaps at the bottom, as on traditional gates, would let wallabies through and would need to be covered with mesh
Steel droppers have been added to the base of the gate to weight the under gate mesh. This design is not fully tested but the gate in this example fence was working well.
Electric wires on a cattle grid
Trampoline springs allow wires to press between bars when a vehicle goes over.
Note insulated wires under to connect wires without shorting and the hot wires go right to edge of the grid.
Heavy vehicles might push the gravel down resulting in a gap. When a gate allows wallabies through it is hard to notice. Usually significant losses occur before it's obvious. Set gates up well from the start.
In this example the concrete has sunk, likely from heavy machinery driving through the gate. Reinforcing mesh in the concrete will be worth while.
Take care not create gaps when positioning strainer posts. If a person opening this gate forgot to put the stick back in wallabies would go through the gap.