* '''Lock Level: Highest connecting road lock level'''
** Rationale: Lock levels are used to protect roads and therefore, the roundabout lock level should be set to the highest lock level of the roads connecting to it. For example, if the roundabout connects a street (lock level 1), primary road (lock level 2) and a minor highway (lock level 3), all segments on the roundabout should be set to lock level 3.
Below are some facts and considerations applicable to roundabouts:
* '''Oval Roundabouts'''