Technical Advice

Technical advice articles for SIDRA INTERSECTION users covering model calibration, network analysis, capacity modelling and more.

• Field Survey Applications for Calibration

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  SIDRA Excel applications for field surveys of key input parameters.

• Gap Acceptance Survey Method

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  Field survey method for Critical Gap and Follow-up Headway parameters.

• About the SIDRA Network Model

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  Fundamental elements of the lane-based traffic Network model.

• Analysing Network Model Results

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  Key aspects of network output to review and understand.

• Closely-Spaced Intersections and Networks

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  Modelling closely-spaced intersections and interchanges as small Networks.

• Roundabout Capacity Model for US Conditions

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  US HCM and SIDRA Standard roundabout capacity model options.

• Midblock Lane Changes at Paired Intersections

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  Lane choice modelling at closely-spaced intersections.

• Effect of Upstream Signals

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  Modelling upstream signal effects on sign-controlled intersections and roundabouts.

• SIDRA and HCM TWSC Models

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  Comparison of SIDRA and HCM Two-Way Stop Control models.

• Calibration in Oversaturated Cases

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  Estimating demand flows when only stop-line counts are available.

• Two-Stage Crossings at Unsignalised Intersections

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  Site and Network templates for two-stage crossing configurations.

• Roundabout as an Interactive System

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  How SIDRA treats roundabout capacity as a closed interactive system.

• Short Lane Model

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  Unique short lane capacity model for all intersection types.

• Decimal Separator

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  Configuring the decimal separator in SIDRA INTERSECTION.