TAXI drivers' unions have called on the Government to provide on-the-job training, following a hefty increase in complaints alleging lack of professionalism. In the first two months of the year, the Transport Branch received 202 passenger complaints against taxi drivers - an increase of almost 25 per cent compared with the same period last year. The Transport Advisory Committee proposed in its taxi policy review the introduction of refresher examinations for drivers. But taxi drivers believe the Government should first provide vocational training for new recruits with little road experience. The chairman of the Urban Taxi Drivers' Association, Mr Chan Kam-pui, said there had been a good response to a training course run by two taxi associations in February. But limited resources - including classrooms, instructors and taxis - have delayed a second course.