modern
traffic engineering, could be said to
have had more influence on modern cities
than many of the great architects and
planners. Working in Paris at the end of
the nineteenth century, Henard drew
some remarkable sketches for traffic circulation.
He is credited with the invention
of the traffic roundabout in 18772 and his
proposals for junction designs would not
look out of place in the modern trafficengineering
handbook (Fig. 2).