The phrase "a system of roadways" is correct and usable in written English.
You can use it when discussing infrastructure, transportation networks, or urban planning.
Example: "The city has invested heavily in developing a system of roadways to improve traffic flow and accessibility."
Alternatives: "a network of roads" or "a network of highways."
In the mid-1930s the need for a national through-traffic system was recognized, and the Trunk Roads Act of 1939, followed by the Trunk Roads Act of 1944, created a system of roadways for through traffic.
No section of M-57 has been listed on the National Highway System, a system of roadways important to the country's economy, defense, and mobility.
No part of M-134 is listed on the National Highway System, a system of roadways important to the country's economy, defense, and mobility.
Everybody benefits from a system of roadways in this country -- even people who don't drive cars -- because it allows a hundred other systems of service and commerce to function well.
Running roughly parallel to I-75, the route has not been added to the National Highway System, a system of roadways considered important to the nation's economy, defense and mobility.
The route from the southern terminus to downtown Houghton is part of the National Highway System, a system of roadways considered important to the nation's economy, defense and mobility.
The Romans had realized that a coordinated system of roadways connecting the major areas of their empire would be of prime significance for both commercial and military purposes.
The Metropolitan District Commission manages a system of regional parks and roadways.
A system of wires underneath the roadway can determine the flow of traffic inside the tunnel by measuring the tunnel's surface weight at any given time.
He responded by recommending the preservation of Manila's old walled Spanish city, and in both cities he utilized familiar City Beautiful components: a system of parks, a network of diagonal roadways for traffic efficiency, and a civic centre complex, formally arranged as the heart of the community.
