Joe Dever (of Lone Wolf fame) also wrote a short post-apocalyptic series (4 books).
The first book has now been put online by Project Aon.
You are Cal Phoenix, the Freeway Warrior, champion and protector of Dallas Colony One. A murderous gang of HAVOC clansmen, led by the psychotic Mad Dog Michigan, are bent on destroying your fragile colony as it crosses the wastelands of Texas on the first stage of a life-or-death exodus to the California coast. These bike-riding clansmen are a formidable enemy: armed, cunning, and extremely dangerous, capable of launching a lightning raid at any time, day or night. You will need all your wits about you if you are to defend your people and reach your destination intact!
Renga in Blue 
Great books really loved these as a boy.
Much better than lone wolf, less nerdy and I have my flask and string vesty type.
In fact I have 2 letters from the great man himself as I wrote to him in the first place sayong how much I loved his Freeway Wrrior series and how I might go about becoming a author. Then I wrote again to ask why there were no mor of them.
He wrote back! What a great chap ! I was sooo pleased it still makes me smile.
The mans obviousley a real talent and maybe should be a bit better known.
So I am off to start Slaughter Mountain Run for the first time in about 16 years.
And why not, it may even banish these winter blues I have.
Happy reading everyone,
Gareth Newman