Modeling a Cul-de-sac
Even if you never plan to build one in real life, understanding what is going on in a cul-de-sac corridor model will set you on the right path for building more complex models. If you truly understand the principles explained in the section that follows, then expanding your repertoire to include intersections and roundabouts will become much easier.
Using Multiple Baselines
Up to this point, every corridor we’ve examined has had a single baseline. In our examples, the centerline alignment has been the main driving force behind the corridor design. In this section, the training wheels are coming off! You’ve seen the last of single baseline corridors in this book.
A cul-de-sac by itself can be modeled in two baselines, as ...