The phrase "major roads" refers to the main or important roads in a particular area that are typically wider, busier, and more significant than smaller or local roads. Full definition
A large number of major roads run through the area, which provides dangerous driving conditions. (lowestpricetrafficschool.com)
But the system now features live traffic, showing traffic flow and incident information on major roads where available. (cnet.com)
For every car owner, the realization that you can not drive on the highways and other major roads without an insurance cover is always a stressing issue. (finance4.net)