Introducing Rodel
Entry Capacity
Calibration
Arrival Turning Flows
Traffic Flows
Flow Modifiers
Average Daily Traffic
Time-sliced Profile
Geometric Parameters
Approach Geometry
Entry Geometry
Circulating Geometry
Exit Width Ex and Exit Lanes nex
Exit Road Width Vx and Lanes nvx
Capacity Modifiers
Calibration
Bypass Geometry
Bypass Approach
Bypass Entry
Bypass Exit
Accidents
Accident Models
Accident Geometry
Economics
Geometry > Exit Geometry > Exit Geometry
Exit Geometry
Exit geometry has four four geometric parameters.
These parameters are not used directly in the HCM or geometric capacity models. However it is crucial that they are consistent with other capacity and accident parameters.
If there are inconsistencies, they can seriously affect the performance of other parameters crucial to capacity and safety. For example an entry with two through lanes feeding into a single lane exit will have both capacity and accident issues. However, when they are consistent the exit geometry then has no effect.
The exit parameters are therefore used for error checking and warning messages in both the HCM and geometric models.
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