Five athletes tested positive for the stimulant bromantan and were disqualified by the IOC, but later reinstated after an appeal to the Court of Arbitration for Sport: swimmers Andrey Korneyev and Nina Zhivanevskaya , Greco-Roman wrestler Zafar Guliyev and sprinter Marina Trandenkova , all from Russia, and the Lithuanian track cyclist Rita Razmaitė . Dr. Vitaly Slionssarenko, physician to the Lithuanian cycling team and team coach Boris Vasilyev were expelled from the games.    The CAS overturned the IOC decision, because bromantan had only recently been added to the prohibited list,  and the athletes and officials were reprimanded.    The Russians had argued that bromantans wasn't a stimulant and thus not banned.  
TfL defined a network of roads leading between venues as the Olympic Route Network ; roads connecting between all of the Olympic venues located within London. Many of these roads also contained special "Olympic lanes" marked with the Olympic rings—reserved for the use of Olympic athletes, officials, and other VIPs during the Games. Members of the public driving in an Olympic lane were subject to a fine of £130. Additionally, London buses would not include roads with Olympic lanes on their routes.    The painting of Olympic lane indicators in mid-July led to confusion from commuters, who wrongly believed that the Olympic lane restrictions had already taken effect (they were to take effect on 27 July). The A4 experienced traffic jams due to drivers avoiding the Olympic lane, and likewise on a section of Southampton Row , where the only lanes available in one direction were the Olympic lane and the bus lane.