First check the InRoads CAD Platform Requirements in the "readme_InRoads.chm" file in the installation folder of InRoads
Within the Windows InRoads Program Group you will find the "SELECTCAD Platform" choose AutoCAD and you may use InRoads Start-Menue with it.
And you may also start InRoads from AutoCAD when loading the "CivAcad2009AT.ARX" or CivUstAT.ARX" form the bin folder of InRoads.