“The best example of a city where foot and service traffic is completely segregated is Venice.”
Chamberlin, Powell & Bon, Architects “Barbican Redevelopment” April 1959
Eric Wilkins, the Chairman of the Barbican Committee, his deputy, Chester Barratt, the Town Clerk, and Chamberlin visited housing projects in Merkel in Berlin, Milan, Venice and Stockholm
Stockholm
Chamberlin Powell and Bon say in their 1959 report that a delegation of the Barbican Committee (presumably composed as above) visited Stockholm in October 1958 to inspect the redevelopment which was going on in the city centre at the time. The particular interest for them was that the redevelopment included plans for separating vehicular from pedestrian traffic by having them on different levels.
Berlin
They also inspected the new Congress Building built by the Benjamin Franklin Foundation in Berlin which was another example of segregation of different types of traffic.
Venice
Chamberlin Powell and Bon do not say in their 1959 report that the Barbican Committee actually visited Venice, but this is what they say in their report about the lessons to be drawn from Venice.
“The best example of a city where foot and service traffic is completely segregated is Venice where all supplies are carried to the city on canals, while pedestrians walk on pavements which cross the canals by bridges. This segregation has worked admirably for many centuries and there is no good reason why the principle should not be applied equally effectively in the City of London.”