Most of the icons only rendered with access: but not with vehicle:

[gaben]

Lanes and Road Attributes mappaint style

I found that if you create access restrictions on ways, the icons rendered with access:forward, but not with vehicle:forward.

It's a problem because the restrictions usually come from traffic signs which apply only vehicles, making usage of access: wrong (in most cases).

Example:

bicycle:forward=yes|no
hgv:forward=yes|yes
highway=residential
lanes:backward=1
lanes:forward=2
lanes=3
taxi:forward=yes|no
vehicle:forward=no|no /* change this to access:forward to get icons */

Solution

Handle vehicle: similarly as access: when dealing with icons.