City Road builder is blender's most advanced road system that makes adding roads to your scene curved or straight so easy, it comes with a lot of features and more to be updated in the future with more advanced lighting system, more roads, junction maker and so man others

The Pro Version comes with a Junction System and more advanced workflow that adds a more realistic road with junctions

select a road and then tweak its settings,

in the pro version you can make as many roads as you want in one scene

use the Rotation options to add another junction and rotate it in any way you want

NEW FEATURE: ADDED X JUNCTION IN THE PRO VERSION

you can create a road, change repeat value to make the road longer

This Add-on comes with a lot of features and it will be updated almost every Month

Features

Make Road in one click
Edit Road Material
Add Curve to road
Curve road with custom curve
Add Side Walk, Barrier, Lights
Make Road an Over Pass
add road side grass
add road side trees
add junctions
add road side fence
edit wetness
edit bump map
and so many Others To Come

http://www.artstation.com/marketplace/p/P3RY7/city-road-builder-pro