How about some kind of elevator which move you to/from the zoning itself. Eg. you activate the grid, but instead of just zone where you stand, you take an elevator below gound, away from the growd, and then automatically zone. This could be done with all grids/city gates. The same applies to when you zone into a place, you zone in far away from the growd and are automatically elevated to the right place, grid/city gate.