The traffic department in Lucknow has introduced AC helmets as part of a trial phase to help cops on duty beat the heat. These helmets have AC vents to channel coolness to the head and a hard plastic shield that works as goggles to protect the eyes from the sun’s glare. The helmet is connected to a large battery pack tied to the waist of the person. After a successful trial, about 500 such helmets will be procured from a Hyderabad-based company. A month-long trial will decide if the product can be introduced formally.