Police are to resume the use of laser guns to pinpoint speeding drivers tomorrow after a five-month break sparked by a judge's fears over the equipment's accuracy. Use of the guns was suspended in November when a Court of Appeal judge ruled that tests be carried out on the equipment after ordering that a convicted taxi driver's case be re-heard. Police say speeding prosecutions have since dropped almost 30 per cent. A University of Science and Technology professor was asked to examine the force's 23 laser guns after the judge's decision. 'The expert has confirmed that the equipment was reliable in terms of consistency and accuracy as suggested by its manufacturer and was within the discrepancy limit we allowed for,' Chief Superintendent of Traffic Tang How-kong said yesterday. But he was unable to elaborate on the findings, saying full details would only be presented during the retrial. In the meantime, police would work on linking laser guns with micro-computers and mobile printers to provide more exact readings, Mr Tang said. A final design is scheduled for submission in the current financial year. During the suspension period, speeding prosecution figures fell 28.3 per cent to 46,450 cases in the four months to February, compared with the same period last year, police said. Over the same four months the number of traffic accidents rose by 11.8 per cent to 4,914. The Taxi Operators' Association said more rigorous tests should be carried out with the participation of drivers' groups before the laser guns are used again. Motor Transport Workers General Union chairman Li Wing-sang said police should abandon the guns altogether.