Sliding track system is extremely popular. It can be opened and closed to allow vehicles to pass through quickly & easily using the pull cord system. It is particularly useful where large loads or cars need to pass through without strips dragging across them. PVC strip curtains on sliding track can be left open open on warm days or through out the summer. There are various configurations available ie - one half static/one half sliding, or both halves sliding. Curtains sliding out of the opening either Bi-parting or uni-directionally.
Further Information On, Twin Track