SHILLONG, February 6: Following the arson at the weighbridge in Umling, Ri–Bhoi district, truckers once again today blocked the tiol Highway 40, which connects Shillong with Guwahati, with boulders and burnt tyres, causing traffic jam much to the inconvenience to travelers on the highway. According to police, on Friday afternoon at Umsamlem village, the frustrated truckers who were stranded for almost two days on the road blocked the tiol Highway 40. Police rushed to the spot for clearing the road. The miscreants involved in the arson fled the area. Meanwhile, police had also detained five drivers suspected for their involvement in the incident.