Tim Linley is founder of Coffee on The Crescent near Hyde Park Corner.
He said he had seen a drop in footfall since the roadworks began in the area.
“The first stage started at about this time last year and it did cause a loss of trade in terms of footfall.
“It was down about five -10%, which, when you have full-time salaried staff, is a very difficult loss.”
Linley did add they had seen some benefits since the first stage, now that people could cross the road by his shop.
However, he added: “I’ve no control of what the council deem is the right thing for everybody.
“I accept it for what it is and try and deal with whatever the repercussions are.”
The council said the A660 was a busy route with pedestrians and cyclists and “injury collisions involving these groups were high”, with “improved infrastructure needed”.
Funded by Active Travel England, the authority said the highways changes would bring the route up to the Department for Transport’s latest design guidance to create high-quality, safe infrastructure for people who walk, wheel and cycle.
As part of the final phase of works there will be changes to some surrounding roads and junctions too, including Cliff Road – which will become one-way to motor vehicles.
Narrow pavements will also be widened and a new segregated cycle lane will be created on either side of Woodhouse Lane, by removing the central reservation on the road.
A new toucan crossing near Cliff Road, to help school children cross, will also be introduced.
The council said the route was consulted on with the public in 2023, with 63% of respondents backing the proposals.
