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SIDRA INTERSECTION 8

SIDRA INTERSECTION is powerful software used as an aid for design and evaluation of individual intersections and networks of intersections. It can be used to analyse signalised intersections (fixed-time / pretimed and actuated), signalised and unsignalised pedestrian crossings, roundabouts (unsignalised), roundabouts with metering signals, fully-signalised roundabouts, two-way stop sign and give-way / yield sign control, all-way stop sign control, single point interchanges (signalised), freeway diamond interchanges (signalised, roundabout, sign control), diverging diamond interchanges. It can also be used for uninterrupted traffic flow conditions and merge analysis.

Download: SIDRA INTERSECTION Features.pdf

SIDRA INTERSECTION allows modelling of separate Movement Classes (Light Vehicles, Heavy Vehicles, Buses, Bicycles, Large Trucks, Light Rail / Trams and two User Classes) with different vehicle characteristics. These movements can be allocated to different lanes, lane segments and signal phases, for example for modelling bus priority lanes at signals. Read more..

See Latest Version Information here.

Learn more about SIDRA INTERSECTION:

OVERVIEW
INTRODUCTION
FEATURES
REQUIREMENTS
SIDRA NETWORK MODEL

HIGHWAY CAPACITY MANUAL
ROUNDABOUT MODELS
SIDRA FOR ROUNDABOUTS
SIDRA FOR SIGNALS
SUCCESS STORIES
UTILITIES & API
OUR CUSTOMERS

TRAINING
SUPPORT
UPDATES

YOUTUBE TUTORIALS
WIKIPEDIA

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We have released some great tutorial videos for SIDRA INTERSECTION 8.
Visit and subscribe to our YouTube channel for these and more tutorial videos.


WORKSHOPS and USER GROUP MEETINGS

SIDRA INTERSECTION Workshops and USER GROUP MEETINGS are open for registration via Eventbrite. Be quick, some early bird ticket discounts are available for a limited time and limited allocation.

Visit our Directory to see a full listing of upcoming Workshops and User Group Meetings.


Unique Lane-Based Analysis of Intersections and Networks

POWERFUL LANE-BASED MODEL

Realistic traffic analysis of closely spaced intersections requires modeling of driver lane choice behavior.
This is lacking in software that use traffic modeling based on lane groups.

SIDRA INTERSECTION is the only software that employs a powerful and unique lane-based model for intersections and networks.

IMPROVED MODEL ACCURACY

Results provided by SIDRA INTERSECTION include approach lane flows and midblock lane change flows to help you in assessing the accuracy of your network model.

Lane use of traffic is a fundamental factor affecting the model estimates of capacity and level of service, delay, queue length, stop rate, fuel consumption and emissions, travel time and network efficiency as well as signal timing results.


LANE LEVEL OF SERVICE Display Phase - Movement display for signalized intersection LANE CHANGE FLOW Display

Signal timings from simple to complex signal phasings

//For any intersection and network geometry

DIVERSITY OF APPLICATION

Signal timing analysis methods in SIDRA INTERSECTION cover an extensive area of application including single intersections and networks (cycle time, green splits and offsets), pretimed (EQUISAT) and actuated signals, variable phasing, pedestrian and vehicle phase actuation, turn on red, yield-controlled and continuous bypass lanes, and so on.

The SIDRA INTERSECTION network model uses lane-based signal platoon movements to determine second-by second arrival and departure flow patterns as a function of signal offsets for signal coordination assessment. SIDRA INTERSECTION Version 8 includes tools to enable calibration for local conditions and presents many detailed signal timing output reports and displays.

UNIQUE METHODOLOGY BUILT ON STRONG RESEARCH FOUNDATIONS

SIDRA was first developed implementing Dr Rahmi Akçelik’s well-known Research Report ARR 123 (Traffic Signals: Capacity and Timing Analysis). This was published by the Australian Road Research Board in 1981 and had a strong influence on signal analysis methods in the 1985 Highway Capacity Manual - an influence that continues today. The ARR 123 critical movement analysis method is built to handle simple to very complex phase sequences used for traditional as well as innovative (compound) intersections and interchanges. The timing analysis methodology was further developed introducing unique methods such as the green split priority and common control group methods in SIDRA INTERSECTION. 

EXAMPLES OF SIGNAL TIMING OUTPUT DISPLAYS in SIDRA INTERSECTION 8


CRITICAL MOVEMENT DISPLAY TIME – DISTANCE DISPLAY SIGNAL COORDINATION DISPLAY FOR NETWORK LANES

Based on 40+ Years of Leading Research

SIDRA INTERSECTION has been a valuable technology transfer tool based on 40+ years of leading research carried out in Australia, first at the Australian Road Research Board and then at SIDRA SOLUTIONS. Our innovations have created a unique traffic engineering software package – motorists around the world have benefited from its practical application.

We have also incorporated the results of research conducted towards development of the US Highway Capacity Manual. SIDRA INTERSECTION has been developed continuously in response to feedback from practising traffic engineers and planners. This feedback has improved the methods used in SIDRA INTERSECTION and expanded its functionality, including a unique lane-based network modeling method.

SIDRA INTERSECTION uses one of the most advanced methodologies of any road traffic analysis software.


Most widely used software tool in the USA

According to the US Transportation Research Board document "Roundabout Practices", SIDRA INTERSECTION is the most widely-used software tool in the USA for roundabout capacity and performance analysis, followed by Synchro and HCS, based on a survey of state transportation departments (based on 28 of the 37 state agencies responding to the survey question).

The report also states "To analyze roundabout performance, about three-quarters of the reporting states use some form of the Highway Capacity Manual 2010 model and SIDRA’s Standard Model; about one-quarter use some form of the United Kingdom equations. (Because states were allowed to select more than one operational performance model, there is some overlap.)"

The report "Roundabout Practices, A Synthesis of Highway Practice, National Cooperative Highway Research Program, NCHRP SYNTHESIS 488, TRB, Washington, D.C., 2016" can be downloaded from the National Academies Press (NAP) website.


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