Namdeo said a well-designed barrier could protect cyclists and pedestrians using that part of the road’s footpath.
“If the geometry is right, barriers can be effective, but they are not a universal fix and the design detail matters enormously,” he said.
Namdeo said the barrier would not have an effect on those using the road itself, such as drivers and cyclists.
“The barrier, if it works, will protect some of the people who use that path, but it will not change the concentrations in the road environment itself,” he said.
“Reducing diesel traffic on that corridor is the only way to genuinely fix the air quality there.”