The Olympic omnium champion, competing in the men's scratch qualifiers at the London venue, received treatment for more than 40 minutes before being taken away by ambulance.
Al Shehhi added that security surveillance cameras on the streets of the emirate were checked to find any video clips which might help to identify the vehicle causing the accident.
The 26-year-old Bahrain Victorious rider fell during a high-speed descent on the fifth stage between Fiesch and La Punt on Thursday, after an exhausting day marked by three ascents over 2,000 metres altitude.
The initiative aims to solidify Ministry of Interior’s objectives of making roads safer.
The new helmet prototype has higher energy absorption, reducing the amount of energy transferred to a cyclist's head in the event of an accident and lowering the chances of serious injury. According to a WHO data, more than 60% of the reported bicycle-related deaths are result of accidents with head injuries.
The injured, some in critical condition, were rushed to the nearby hospitals.