Motorist and two pedestrians killed on South Australian roads in horror 24 hours Cycling great, Stuart O'Grady, admits to doping, police continue to search a Coober Pedy mineshaft for the body of Karen Williams and a regal name for a newborn prince. A man has died after his car crashed and burst into flames on the Yorke Peninsula, about 25km northeast of Minlaton. Picture: Jeff Anderson/First On Scene Media Source: Supplied TWO elderly pedestrians and a motorist have been killed in a horror 24 hours on the state's roads. An Adelaide man, 79, died in hospital overnight from injuries he suffered when hit by a car on Wright St in the city at 12.35pm yesterday. His death followed that of a Parkside woman, 84, who was hit while crossing Cross Rd at Myrtle Bank about 10am yesterday. She was rushed to the Royal Adelaide Hospital with critical head injuries and later died. This morning, a man died when the car he was driving crashed and caught fire near Curramulka on Yorke Peninsula. The vehicle caught fire and the driver, a 61-year-old Yorke Peninsula man, died at the scene. The Yorke Highway between Ross Rd and Black Bobs Rd was closed while Major Crash officers investigated. The deaths take the state's road toll to 66, compared with 51 at the same time last year. Police have issued a safety warning to road users stressing that road safety is everyone's responsibility.