Facility Builder
Place ramps along a mainline and the HCM Chapter 10 segmentation rules derive the analysis segments. The
derivation calls the library's own segment_ramp_section, so the table here and the table the
engines analyze cannot disagree.
Mainline
Segments are derived from the features by the Chapter 10 rules and cannot be dragged. Drag a ramp marker, or focus it and use the arrow keys, to move its gore; stations snap to 0.1 mi and the station field is the fine adjustment. Clicking a marker without moving it opens that feature's editor in the list below.
Derived segments
0 segments, 0.00 mi
| # | Type | Length (ft) | Lanes | Station (mi) | From | Override |
|---|
Demands
Each period is 15 min, and Chapter 10 sets no upper limit on how many there are. Values are veh/h.
| Source | P1 | P2 | P3 | P4 |
|---|---|---|---|---|
| Mainline entering |
Checks
Nothing flagged.
Exporting to the fixture schema carries the facility parameters above and every per-segment field this editor shows. It does not carry ffs (per-segment free-flow speed override), caf / saf / daf, caf_schedule / saf_schedule, ramp_metering, c_ifl_override, time_step_s, which have no editor here. A fixture that was imported keeps those fields verbatim through a round trip.