OpenRoads Designer CONNECT Edition

End Condition Exception Transitions

End condition transitions are used where the end condition may change suddenly due to changes in the existing surface or other reason, and you want the transition to be smooth over a specified station range rather than a sudden change over a short length. One common instance of this is where the end condition criteria may cause a slope to be changed from 1:6 to 1:2 over a 5 foot processing length. In this case, a smooth transition from 1:6 to 1:2 over 100 feet would be ideal. A transition could be created that starts 100 feet back from the 2:1 slope station and ended at the 2:1 slope station. Another instance would be going from an end condition with no shoulder to one with a shoulder. Here, you could model the shoulder as gradually appearing rather than going from no shoulder to full shoulder in a 5 foot interval.

As with the override exception, the transition exception needs to be edited after placement. The following graphic is an example of editing a transition from no shoulder to having a shoulder. Notice that the shoulder point was selected first so that the transition line uses that feature style.