Bangladeshi Mominur Rahman Royal is stopping traffic -- literally.
The 36-year-old is on a one-man crusade to reduce unnecessary honking in one of the world's noisiest cities, where the cacophony of vehicle horns in heavy traffic is as loud as a rock concert.
On the weekend, he stands at a busy intersection near his home holding a yellow placard with the Bengali rhyme "Horn Hudai, Bajay Bhudai" meaning "Only an idiot honks a horn unnecessarily".
"This is my silent protest against the nuisance. I just try to deliver the message to the people," he told AFP as cars, buses and trucks rumbled noisily past him.
Since starting his campaign four years ago, the graphic designer said he has received overwhelming support.
"People on their way home stop by to stand by my side, silently holding my placards on the road even though they don't know me. This is a sign of a positive change."
Photos of his silent protest have been shared thousands of times on social media, attracting many supportive comments.
According to the World Health Organisation, the maximum noise level that can be tolerated by humans for eight hours without some loss of hearing over time is 85 decibels.
In Dhaka, home to 18 million people and more than a million registered motor vehicles, the sounds of honking can reach 110 decibels during peak hours, according to a 2017 environment department study.
Heavy construction and loudhailers used for political and religious events add to the din that has contributed to Dhaka being regularly ranked as one of the world's least livable cities.
Around 12 per cent of Bangladesh's 165 million population suffer from hearing problems due to noise pollution, the study found.
"The number of traffic (policemen) coming to the hospital with hearing problems every week has become a major concern for us," Bangladesh police spokesman Sohel Rana told AFP.
The government has passed anti-honking laws with culprits facing up to six months' imprisonment.
But the rules are weakly enforced and even illegal ear-splitting police and ambulance horns are used by ordinary drivers.
Royal, who sometimes campaigns after work also, is worried his hearing will suffer due to the amount of time he spends standing at intersections.
But the young father said he would keep going until noise pollution reduces, adding that he was "taking a hit for a greater cause".
"I strongly believe this abnormal behaviour (of honking) will change one day and we will be able to leave a better Dhaka for our future generations.
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