Roundabout

The calculation is performed according to either HCM 2010, HCM 6th Edition (Fundamentals: Roundabouts according to the HCM method ), HCM 7th Edition (Fundamentals: Roundabouts according to the HCM method ) or TRL/Kimber (Fundamentals: Roundabouts according to the TRL/Kimber method).

1.  Make sure that the values of the input attributes are correct at the nodes with control type Roundabout.

2.  Check and adjust the parameters on the Roundabout page.

Element

Description

HCM

Select this option for an impedance calculation based on the HCM 2010 (Fundamentals: Roundabouts according to the HCM method ).

HCM 6th Edition

Select this option for an impedance calculation based on the HCM 6th Edition (Fundamentals: Roundabouts according to the HCM method ).

HCM 7th Edition

Select this option for an impedance calculation based on the HCM 7th Edition (Fundamentals: Roundabouts according to the HCM method ).

TRL/Kimber

Select this option for an impedance calculation according to the TRL/Kimber method (Fundamentals: Roundabouts according to the TRL/Kimber method).

Maximum tCur

If this option has been checked, enter a value which is used as user-defined maximum turn penalty at the node.