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A pedestrian is in a serious condition after being hit on a bypass this morning.
The crash near West Malling railway station stopped commuters travelling between the A20 and Kings Hill on Ashton Way.
A police spokesman said the pedestrian was later taken to a London hospital with "serious" injuries.
Officers and paramedics from South East Coast Ambulance Service were called to the southbound carriageway of the A228 near West Malling at 7.10am on Wednesday (Apr 27).
The spokesman said: "The pedestrian was treated for injuries described as serious. He has been taken to a London hospital for further medical attention."
It is believed the injuries are not life-threatening.
The road was closed for two hours while emergency services dealt with the incident and reopened at 9.15am.
A witness said: "I drove down the bypass heading out from Kings Hill and on the opposite side of the road and saw an ambulance and a medic car and a person lying in the middle of the road receiving urgent medical attention and CPR.
"There was a massive backlog of traffic because of the incident."
They added: "The bypass is 50mph but people fly down it like a drag strip. There needs to be some sort of speed safety measure put in or more people will be hurt."
Police have appealed for witnesses. Anyone who saw what happened should call 01622 604100, quoting reference 27-0181.
Kent Highways originally sent a Twitter alert warning of traffic delays. It said: "Reports of an RTC on the A228 Malling Road southbound near Station Approach. Kent Police are attending. Expect delays on the approach."