The phrase 'smooth traffic flow' is correct and usable in written English.
It is used to refer to a situation in which the flow of traffic is unimpeded and efficient. For example, "The new traffic signals have resulted in a much smoother traffic flow in the downtown area."
A key underlying aim of street schemes is often smooth traffic flow.
What good is Boris's fine talk about measures to smooth traffic flow?
Transportation officials attributed the relatively smooth traffic flow to fewer commuters; many are vacationing because of the coming religious holidays.
Research by scientists from France, Belgium and Germany shows that while foraging, the insects maintain a smooth traffic flow even in the face of a potential jam.
The problem, as Judge Kim McLane Wardlaw wrote in dissent, is that the Redondo Beach ordinance isn't a narrowly tailored constraint to ensure smooth traffic flow.
Boris Johnson came to power in 2008 promising to "smooth traffic flow" and will leave his successor with a growing congestion problem and some furious disputes about road space and how it should be managed.
As part of a decade-long redesign of the region's airspace, the F.A.A. is also seeking to smooth traffic flows among the airports so that flights landing at Kennedy do not restrict departures at La Guardia.
Singapore has led the way with using variable tolls to smooth traffic flows during rush-hours; Britain is pioneering "smart motorways", whose speed limits vary constantly to achieve a similar effect.
Positive incentive to adopt these new concepts include, besides the targeted safety and security improvements, smooth traffic flows, more flexibility in how travel time and in-vehicle space can be used and easy multi-service solutions for e.g. travel planning.
Her paper points to the need for a paradigm shift in the production of knowledge within local transport plans, whereby communities and local planners work together to iteratively improve, reframe and ultimately transform the current status quo, which favours smooth traffic flows over people's access to services and social inclusion.
You might consider that in terms of smoothing traffic flow, faster boarding times, passenger comfort and security, you might consider having a second crew member.
