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To warn people of pollution hotspots, NISTADS (National Institute of Science, Technology and Development Studies) the policy arm of the CSIR (Council of Scientific and Industrial Research) is rolling out a project to install pollution sensors at the Capital’s traffic junctions. The aim, said NISTADS director Dr Prashant Goswami, was to develop a messaging alert system that will warn people of spikes in pollution in certain localities. For over a year, NISTADS researchers have been running a test project that involved a pollution-monitoring unit affixed on a van which went around specific localities in Delhi. It recorded the waxing and waning of particulate matter throughout the day. Generally, pollution levels tended to be higher in the morning and ebbed as the sun ascended.