A delivery worker died yesterday when a truck he was travelling in slammed into a stationary truck on Cha Kwo Ling Road in Kwun Tong, the third fatal accident involving stationary vehicles in the same road in five weeks. The spate of accidents has prompted the Transport Department to launch an investigation. Kwok Yick-bun, 20, was in the passenger seat of the truck when the collision happened at about 11.20am. The vehicle, travelling towards Kwun Tong, was negotiating a right-hand bend outside Hoi Chu House when it skidded and crashed into a parked truck. The collision peeled off one side of the cab and hurled Kwok out of the truck, landing behind the stationary truck, police said. The truck then swung across the road and hit another truck on the other side. Kwok was taken to Queen Elizabeth Hospital, where doctors declared him dead at 11.50am. The 23-year-old driver, identified only as Chan, was arrested for dangerous driving causing death after police said excessive speed appeared to have been a factor. Chan was in stable condition in United Christian Hospital last night with head injuries. He was placed on bail of HK$5,000 and will report to police on September 15. Superintendent Fung Tak-yin of Kowloon East traffic unit said preliminary investigation indicated that the truck was travelling beyond the legal speed limit of 50km/h. 'The collision was serious and the lorry was seriously damaged. We believe high speed could have caused such damage. Government chemists will help us to confirm this,' he said. Police said a 40-metre-long brake mark was left by the truck. The vehicle was taken to a government plant in Ho Man Tin for inspection. The Transport Department said it would inspect the site and investigate 'feasible measures' to improve road safety in the area. On March 5, police constable Choi Yiu-fai, 46, was killed when his motorcycle hit a stationary truck near the junction with Yau Tong Road. On March 30, a businessman, 50, died after his car hit a stationary truck outside Cha Kwo Ling Tsuen. Police are still investigating the cause of his death.