Shillong: East Khasi Hills has banned heavy and commercial vehicles from parking on national highway carriageways and paved shoulders.Vehicles may park only at designated parking bays, lay-bys or wayside amenities, district magistrate Abhilash Baranwal ordered.“Heavy/commercial vehicles are being habitually parked on the carriageway/shoulder of national highways, obstructing traffic and endangering human life, in contravention of…