Entrances

Entrances allow Entities to enter a LEGION Model Builder model. They introduce particular numbers of Entity or Supply Types over time according to one or more Arrival Profiles.

Tip: Entrances may be used within models to represent arriving trains, trams, buses, aeroplanes, etc.

Non-vehicular Entrances perform best when they are narrow (about 0.5m) in the direction Entities are travelling in. Drawing Entrances at this depth prevents Entities from stacking up behind each other, as 0.5m will only introduce (or ‘seed’) one Entity per time-step. This means you will avoid the problem of fast moving Entities getting blocked behind slower ones. Entrances must also be placed at least 20cm clear of any walls in order to accommodate the proper seeding of Entities.

Note: For Entrances, the LEGION Simulator keeps a count of the Entities that failed to enter in any time-step and tries to introduce them in a subsequent time-step.

Placing Entrances and Exits in high-density areas with bi-directional flow should be avoided: models should be extended out to non-bottleneck areas whose exclusion will not affect simulation outputs. If you are forced to deviate from this guideline, then Entrances and Exits should not overlap and the depth of Entrances should be kept to a minimum, 1-10cm being a good guide.