Sixty-seven bus drivers, subway motormen and conductors--those trusted to transport thousands of New Yorkers daily--have tested positive for hard drugs over an 11-week period, a newspaper reported. Traces of such drugs as cocaine, methadone, morphine, codeine and marijuana were also found in the urine of 79 other Transit Authority employees, including police officers, dispatchers, track workers and car cleaners. The results of the tests were released to the Daily News under the Freedom of Information Act. Those testing positive included 41 bus drivers, 10 subway motormen, 16 conductors and five transit police officers, the paper said. In each group, at least half tested positive for cocaine.