Spain's Alberto Contador eats a banana in as he rides in the pack during the sixth stage of the Tour de France on July 10, 2014. The cyclists aim to eat up to 350 calories an hour as they ride, and up to 9,000 calories a day. Laurent Cipriani/AP hide caption

itoggle caption Laurent Cipriani/AP

A stretch of Foothill Road in Pleasanton, Calif., near where police say Cody Hall, 18, lost control of his car and struck two cyclists. One cyclist died, and Hall was charged with murder this week. Google Map hide caption

itoggle caption Google Map

Pedestrian Dionette Cherney died after a bicycle accident in San Francisco in July. The city has seen more frustration between cyclists and pedestrians this month, as they are forced to share one sidewalk during work on the city's iconic Golden Gate Bridge. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP