SimCity 4: Rush Hour/New Roads

The new roads have the purpose to reduce traffic and way more.

Avenues
Avenues are one of the systems that really reduce congestion when used properly.The middles of the avenue depends one the wealth of the zone you made.If its low,just wooden lights.If its medium,Some shurubs and trees and metal lights.High wealth zones brings in the beauty with a couple of flower squares.

Avenues to Highways,Highways to avenues
Now there is a transition that avenues can now transfer to a highway and vice versa.

One-way roads
If theres no room for avenues,you can use one-way roads to reduce traffic pollution.One-way roads are 2 lanes in a road in the same direction.

New bridges
There are more bridges!

So that covers all things up.