ISLAMABAD: Authorities will bar vehicles without an electronic tag, or e-tag, from entering the federal capital of Islamabad starting Jan. 1, the Pakistani interior ministry announced on Sunday, in a move aimed at streamlining traffic management and improving monitoring at Islamabad’s entry and exit points. Authorities made e-tags mandatory for all vehicles in the capital in Nov. to enhance security in the city. Vehicles already equipped with a motorway tag, or m-tag, do not require an e-tag.