Bengaluru: Dug-up roads across Banashankari 1st Stage, including in Srinivasa Nagar, Ashokanagar, Vidyapeetha and Hanumanthanagar, have disrupted traffic and left residents coping with dust, even as civic agencies say the works are necessary and nearing completion.The affected stretches, under Bengaluru West City Corporation, are seeing multiple infrastructure works carried out at once. While Gas Authority…