While helmets do protect the rider in the event of crash or accident, the mere presence of a helmet increases the likelihood of a rider getting into an accident with a car.[6] More bike-specific infrastructure such as bike lanes and bike paths is needed to keep bikers safe.[6] Commercial air travel ranks as the safest form of transportation in terms of deaths per billion miles traveled, with .07 deaths/billion miles traveled, followed by bus travel at .11 deaths/billion miles traveled and train transport at .43 deaths/billion miles traveled.[7] Automotive travel ranked as the most dangerous with 7.3 deaths/billion miles traveled.[7]