Hi Turbo,
Awesome work. I'm a tinkerer and not a programer but I tried using your Beta V5.16 last night and I could not get the bearing or angles to work uni directional. I did however get the alerts to work and it would seem that they only work inside your alert circle inside of the proximity point. When prox 400m and your circle 50m ( from same location ) Alerts go of 50m away in both directions. When your circle is 100m alerts go of 100m. Thinking outside the square I reduced the size of your circle and moved it of the road ( still inside Prox ) so that it only covers the lanes going that way. It worked. I then thought that an oblong or rectangle shape would be more appropriate than a circle as the alerts only go off inside your circle inside prox I wanted to make it 400m long but only one lane wide 2.4m or 8 ft. Not being a programer I simple added more circles to form some sort of oblong along the road ( think of laying dollar coins on top of each other slightly offset ) which then got me thinking about Tom1807 post that there are up to four circles on the tollway. Looking at there locations in his post they are offset by a straight line. Tom 1807 will have to confirm as I cant scroll down that pic. But its possibly to give a longer distance whilst not crossing more lanes. All this was done in simulation mode on a 1390. I Ran out of time but will test again as soon as time permits. Can you confirm that you have had directional poi's working and if so what model gps.
Updates soon Paul
P.S. I couldn't get the wav to work in the link field yet