The best replacement for stop sign is yield sign.

The best alternatives to stop sign are rated as following:
★★★★★  yield sign
★★  stop line
★  stopsign
★  traffic signal
★  give way
★  roundabout
★  white line
★  traffic light
  give way sign
  stop light

Your alternative for stop sign is not listed? Suggest!
Speaking about stop sign, one probably shouldn't forget about solid white line.

Other search terms related to stop sign and their ratings are:
★★★★★ solid white line
★★★★ line
★ stop
You have in mind a companion for stop sign and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of stop sign in all years. Click on graph for more.
stop sign
yield sign
stop line