Traffic Network, Transportation Network
noun
A mix of cars that pass through a net, that's a traffic network.
こうつうもう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
大地震が首都圏の交通網を麻痺させました。
A massive earthquake paralyzed the transportation network in and around Tokyo.