local cmd = {
	"TREES_RUNAROUND",
	"SHUNT_MAINLINE_REV",
}
__approach_callback_mode = 1

if event.approach and not event.has_entered then
	atc_set_ars_disable(true)
	atc_set_lzb_tsr(1)
	return
end

if event.train and atc_arrow then
	if not F.has_rc("BYARD_NOID_SHUTTLE") then return end -- not our train, disregard
	if not F.has_rc("TREES_RUNAROUND") then -- train has arrived from yard, split and runaround
		split_off_locomotive("A0B0") --disable ARS to stop the rest of the train engaging the signal
		F.add_rc(cmd) --add RC commands tomake the train runaround
		atc_send("S3A1") --send the loco on its way to make the runaround
		return
	end
	--else loco has returned from runaround
	F.remove_rc(cmd) -- remove runaround RCs
	atc_send("S0WRS1") --reverse the train and creep towards the other departure signal
	return
end