On Fri, Oct 05, 2012 at 11:13:27AM +0200, Chris66 wrote:

In Germany most roads with construction=minor have maxspeed=.. set.

In this case the default mkgmap rule:

# Lower the road speed of ways under some construction. highway=* & construction=* { add mkgmap:road-speed = '-1' }

is acting to strong.

So I suggest:

# Lower the road speed of ways under some construction. highway=* & construction=* & maxspeed!=* { add mkgmap:road-speed = '-1' }

Thanks for the suggestion. Committed in r2339. Marko