A 135-km six-lane arc that partially surrounds the National Capital Region and acts as a high-speed thoroughfare for cargo trucks was filled with tractors today as thousands of farmers who have been camping on the highways in and around Delhi began their march against new farm laws. The tractor rally, called by some 40 farmer unions, started on the Western Peripheral Expressway that starts at Ghaziabad and ends in Palwal. The police have asked people to avoid this expressway, which makes the other half of Western Peripheral Expressway, making a circle around the National Capital Region or NCR.