Teleport to custom coordinates and detect a closed road

Hi,

I have the following code:

Teleport when not known z axis, +1 meter above terrain (Also, I would appreciate it if someone knew another method to teleport to x, y without knowing the z axis, with a small code block):
x=-777 y=1700 p=Engine.castRay(vec3(x,y,99999),vec3(x,y,-99999),1,1) if p then be:getPlayerVehicle(0):setPositionNoPhysicsReset(vec3(x,y,p.pt.z+1)) end

When you know all coordinates:
be:getPlayerVehicle(0):setPosition(vec3(x, y, z))

Is it possible to teleport to a closed road after one of the above commands is executed?