SIDRA INTERSECTION software complements Highway Capacity Manual (HCM 2010) as an advanced intersection analysis tool. Using SIDRA INTERSECTION, you can evaluate alternative treatments involving signalized intersections, roundabouts, two-way stop and give-way (yield) sign-control, all-way stop sign control, single-point urban interchanges, signalized midblock crossings for pedestrians, all in one package. Intersections with up to 8 legs, each as a two-way road, one-way approach or one-way exit. The Highway Capacity Manual version of SIDRA INTERSECTION offers options for US Customary and Metric units.

IMG Integration of the new HCM 2010 roundabout capacity model into SIDRA INTERSECTION 5.1.pdf 

The Highway Capacity Manual is prepared by the Transportation Research Board (TRB) Committee on Highway Capacity and Quality of Service:

TRB (2010). Highway Capacity Manual. Transportation Research Board, National Research Council, Washington, DC, USA.

Also refer to:

TRB (2010). Roundabouts: An Informational Guide. NCHRP Report 672. Transportation Research Board, Washington, DC, USA.

These publications can be ordered by visiting the Publications section of the Transportation Research Board website.

SIDRA INTERSECTION is compatible with the US Highway Capacity Manual (HCM). However, unlike some software packages available in the USA, the HCM version of SIDRA INTERSECTION does not claim to be a simple replication of the HCM procedures. For detailed discussion on this topic, visit our web page SIDRA INTERSECTION for HCM 2010.

TRB Highway Capacity Manual 2010 (HCM 2010) has been published recently, and a full implementation of the new roundabout capacity model described in the manual is available in SIDRA INTERSECTION 5.1. This new version of the software offers powerful extensions to the HCM 2010 methodology to enhance your roundabout design capabilities.

The extensions of the HCM 2010 roundabout model available in SIDRA INTERSECTION are listed in the HCM 2010 Roundabout Capacity Model page.  


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