lanes1 = sensor.lanes_dir1
        lanes2 = sensor.lanes_dir2

        if not inverse:
            lanesToOrigin = "|".join(str(i) for i in xrange(1, lanes1 + 1)) + "|"
            lanesToDest = "|".join(str(i) for i in xrange(lanes1 + 1, (lanes1 + lanes2) + 1)) + "|"
        else:
            lanesToOrigin = "|".join(str(i) for i in xrange(lanes1 + 1, (lanes1 + lanes2) + 1)) + "|"
            lanesToDest = "|".join(str(i) for i in xrange(1, lanes1 + 1)) + "|"

        return [lanesToOrigin,lanesToDest]