LOS ANGELES—Tiger Woods was driving nearly 90 mph—twice the posted speed limit—on a downhill stretch of road when he lost control of an SUV outside Los Angeles and crashed in a wreck that left the golf superstar seriously injured, authorities said Wednesday. Sheriff Alex Villanueva blamed the Feb. 23 crash solely on excessive speed and Woods’ loss of control behind the wheel. The athlete will not face any citations for his third high-profile collision in 11 years. “The primary causal factor for this traffic collision was driving at a speed unsafe for the road conditions and the inability to negotiate the curve of the roadway,” the sheriff told a news conference. Woods was driving 84 to 87 mph in an area that had a speed limit of 45 mph, Villanueva said. The stretch of road is known for wrecks and drivers who frequently hit high speeds. Due to the steepness …