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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span lang=EN-US>Thanks for the tip about the “change” tag.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>So here is what I’ve done – does it sound right?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>- in the section where the slip lane joins the 2-lane through road (where lanes=3), I have added: “change:lanes=not_right|not_left| ” <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>(this hopefully means that the left hand lane cannot change lanes to the right, and the middle lane cannot change lanes to the left)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>- then in the next section where turn left and right slip lanes are added (where lanes=5), I have added” “change:lanes= |not_right|not_left|| ”<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>(which hopefully means: the left slip lane can do as it pleases, the 2<sup>nd</sup> lane (the left-most of the 3 through lanes) cannot change right, the middle of the 3 through lanes cannot change left, and the other 2 right-most lanes can do as they please)<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I’d be very interested to see what a routing engine does at the point where the slip lane joins the 2 through lanes. That is, does it associate the slip lane with the left-most of the through lanes and hence know a vehicle can’t jump from the slip lane to the centre lane at the instant – or do the lanes go into a “melting pot” with no association? Similarly where lanes=3 changes to lanes=5 where the turn left and right slip lanes are added.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Ian<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>