Motorists expected to flood licence offices next week have been told to stay away unless they have urgent applications. Driving licences will be valid for 10 years instead of three from Monday. The Transport Department is concerned drivers will turn out in droves to renew licences which have not expired. The department says the average 40,000 licence transactions per month could boom to more than 60,000 in June. Acting assistant transport commissioner Lawrence Liu Hing-lun suspected drivers were delaying renewals to take advantage of the 10-year licence. He appealed to drivers to wait until licences had expired before renewing. 'Non-habitual' motorists with licences due for renewal were also asked to wait until crowds died down. Extra drop-in boxes will be provided at the four licensing offices in Admiralty, Kwun Tong, Sha Tin and Mongkok. 'We usually get about 3,000 people in all four offices per day; it's possible this may increase to over 5,000 on Monday,' Mr Liu said. Before the 10-year move, drivers had a licence option of one year at $288 or three years at $864, including levies to the Traffic Accident Assistance Scheme. The new 10-year licence for everyone under 60 will cost $900, including the levies, offering a substantial discount.