Effect of roads on communication/supply?

[nhill40]

I'm curious if in the PzC engine what effect roads have, if any, on communication/supply.

I've given the manual a pretty good search and it really sounds as though things such as supply and HQ contact determination are based upon simple hex radius calculations...though it seems to me units along a main thoroughfare would enjoy some sort of communication benefit compared to a unit out in the boonies.

Sorry for the noob question, but I've only played through relatively simple scenarios at this point and want to make sure I understand some of the finer points before tackling anything more complicated!