Hey @strochthecasbah! You’ve certainly taken all the proper steps to fine-tune the motion detection in that environment. Great call on using a wedge piece! Other than trial and error with settings, I recommend exploring the addition of another Wedge. As vehicles create a large heat signature they can sometimes be detected. Adding an additional angle or Wedge will help to avoid the roadway, especially from a raised porch surface.
Check out our Community post on how this motion works for a visual on the range of detection. I hope this helps! 