GeoffC:
Just got one of these mapsbgl-ev.de/daten/news/2009/BG … LSEITE.PDF
Shows all the roads with a saturday holiday ban plus alternative routes, roads where lorries are banned completely and info about the eco-zones in many German cities, a good little map in fact.
Its published in may each year by the BGL (German transport association), I got mine from the firm where I’m working at the moment but you can order it here:bgl-ev.de/web/service/angebo … .htm#karte
at the bottom of the page, costs about Euro 5 as far as I can make out.
Geoff
Hi GeoffC, that’s a very useful contribution to this topic if you don’t mind me saying so. 
Thanks for posting it. 
Another German transport association is:
http://dslv.org/de/site/en/index.xml (English language version.)
A little about DSLV from their homepage:
The Association of German Freight Forwarders and Logistics Operators (Deutscher Speditions- und Logistikverband e.V. - DSLV) is a fairly young organisation. It was founded 2003 in Bonn. It was the merger of the two most important organisations representing the interests of our industry — the Federal Association of Freight Forwarders (Bundesverband Spedition und Logistik - BSL) with its regional member associations and the Association of German Road Hauliers (Vereinigung Deutscher Kraftwagenspediteure - VKS). With its approximately 4,000 members, the DSLV represents about 90% of the estimated 55 billion Euros turnover generated by this industry.