This is, so far as I can tell, an unique example of a pure signing contract put out to tender by GDDKIA (Poland's national highway authority for motorways and trunk roads):http://www.reprocentrum.pl/gddkia/523/
The individual sheets, which are all available for viewing and downloading, are in DjVu format. Irfanview
may be able to handle them natively; ACDSee
will handle some (including the sign panel detail sheets) and choke on others (including the sign inventory sheets, which include full-color photographs of the existing signs). The free (and open-source) DjVuLibre library, which is downloadable from SourceForge, allows easy and reasonably rapid conversion of DjVu to TIFF. The sign panel detail sheets are pattern-accurate and show Drogowskaz (the Polish traffic signing typeface) in all its crotchety glory.
The main change between the existing and new signs is that the major German cities accessible from the A-4 are now to be explicitly signed, with distances given on route confirmation signs. The Polish A-4 is the eastward continuation of the German A4, for which the Poles have chosen Dresden as the control city. The A-4 interchanges with the A-36 and Berlin is used as the control city for traffic exiting the A-4 for the A-36. The existing signs give no indication whatsoever of German cities; instead, the Polish border towns (Zgorzelec/Jedrzychowice on the A-4, and Olszyna on the A-36) are signed by themselves.
I think the new signs are, broadly speaking, an improvement on the existing ones. The big German cities are more logical choices for forward destinations because of their traffic importance and since Poland is now in the Schengen zone, there are no frontier controls which would warrant special treatment in signing. The new signs can also be interpreted as making a political statement and, on the whole, I think it is a positive one. My only concern is a technical one: since the border towns will continue to be signed, the new signs are somewhat message-heavy.