The Metropolitan Traffic Police Division (MTPD) is set to tighten its screws on those driving under the influence (DUI) during the upcoming festivals of Bada Dashain, Tihar and Chhath.The MTPD will increase its surveillance and check posts to contain a high number of incidents of DUI leading to accidents during the festive season.MTPD Senior Superintendent of Police (SSP) Milan Basnet said the frequency of the checking will be increased in view of the possibility of serious accidents taking place due to drunk drivers and reckless driving during the festive season.