Apple Maps and Google Maps do a good job of showing traffic lights and stop signs on the route while driving.

If I understand OM styling correctly, these POIs could be made to be shown only in the vehicle theme. Anyway I'm not sure if it's possible to control their Z index so they're drawn on top of the route blue line. I hope someone with a better knowledge of the code could provide some insight on that.

In the meantime, I'll try to draw some SVGs for the corresponding POIs:

• highway=traffic_signals
• highway=stop
• highway=give_way
• traffic_calming=yes,bump,mini_bumps,hump,table,cushion,dip
• highway=crossing with crossing=uncontrolled, crossing=marked, crossing=zebra, crossing=unmarked

It feels like that these icons should be 1.5-2.0 times bigger than regular POIs (like shops) to be easier noticed while driving. That is also true for a speedcam icon, which at the moment seems too small for me.

Discussion on the importance of these features for the driver as well as further suggestions are welcome.