Updated at 5.18pm: Traffic at the Cross-Harbour Tunnel was generally normal during Thursday?s morning rush hour, a Transport Department spokesman said. Thursday is the third working day after the controversial Eastern Harbour Crossing toll increase on Sunday. The spokesman said 600 more vehicles used the Cross-Harbour Tunnel between 6am and 9am on Thursday ? up four per cent ? compared with a normal Thursday for the same period. The Western Harbour Crossing also recorded a four per cent increase of 2,100 vehicles for the period. But 2,100 fewer vehicles used the Eastern Harbour Crossing on Thursday. It was a 19 per cent drop compared with a normal Thursday during this period, the spokesman said. He said the department was continuing to monitor the cross-harbour traffic and liaise with police, bus companies and tunnel companies. Transport Department deputy-commissioner Lau Ka-keung predicted traffic jams at the Cross-Harbour Tunnel might worsen over the next few days. This was because the number of goods vehicles was increasing and the HKCEE English exams would be held on Friday, he explained. The spokesman appealed to students attending exams to pay attention to the weather and check traffic conditions by listening to broadcasts. They should also allocate more time for travelling to examination centres, Mr Lau suggested Tunnel tolls on Sunday rose by between $10 and $30 depending on the type of vehicle, with cars jumping $10 to $25. This was the second time the New Hong Kong Tunnel company increased tolls.