keiko shirayama, nhk world, tokyo. >>> millions of people in beijing use electric bikes to get aroundnd to make a living. the high numbers have caused traffic problems and safety concerns. but steps to rein them in are causing headaches for small businesses. nhk world's daisuke azuma reports. >> reporter: going through the capital's heavy traffic, scooters and bikes, almost all of them powered by electricity. some 4 million residents have turned to the easy to get license-free e-bikes. >> translator: i always use an e-bike. i can avoid traffic jams so it's quick. >> reporter: but authorities banned e-bikes from certain streets, mainly passed the avenue. that's because electric bikes were involved in nearly 40% of total traffic injuries last year. the ban succeeded in eliminating e-bikes from some areas but the problem shifted to nearby streets. people have not stopped using electric bikes. to avoid restrictions, they are using this road instead. it's just several blocks away from the main road. now, it has become a danger zone. walkers say e-bikes have populated here since the ban and