map without streets...

I created with postgresql and mapnik a map that looks pretty good. But…
I need to be able to zoom in into the map whitout all the small streets being shown.

How can I create a map without the small streets and regions?
Should I delete them in the postgres-db? If so, which records/tables should I delete?

Thanx,
Jelle

You could edit the Mapnik stylesheet, and remove everything you don’t want rendered. Its probably the osm.xml file in your Mapnik directory.
Remove the sections for highway=unclassified and highway=residential etc.