Access your Virtual Computer We will  email you details to access your Virtual computer using Remote Desktop Connection. Important: Your IT department may have placed restrictions on your computer to prevent connecting to a Virtual Computer from another company. If you have difficulty in connecting to this remote Virtual Computer, please consult your IT department. You will be unable to undertake the training without access to the virtual computer. It is your responsibility to arrange access with your IT Department if required. Please keep your access details private and secure. The Virtual...

SIDRA Videos

Read the System Requirements for SIDRA INTERSECTION and SIDRA TRIP. SIDRA INTERSECTION 9 Memory 2 GB RAM or higher. Importing large OpenStreetMap (OSM) areas may increase the amount of RAM required. Display 1280x1024 or higher resolution monitor. Font size must not be increased above 100% if 1280x1024 resolution is used. Operating System Windows 11 and Windows 10. Windows 8.1, Windows 8, Windows 7 with Service Pack (SP) 1 are subject to various limitations for Floating Licence use and the online software update function. Windows 7 has some limitations related to input and output displays. 64...

SIDRA INTERSECTION is the most widely-used software tool in the USA for roundabout capacity and performance analysis 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 analyse roundabout performance, about three-quarters of the reporting states use some form of the...

Powerful Network Signal Timing Analysis Network timing for signal coordination involves Network Cycle Time and Site Phase Time calculations as well as Signal Offsets calculated for Routes defined by users. Network Cycle Time, Site Phase Times and Signal Offsets can be specified by the user. Signal timings for Common Control Groups (CCGs), i.e. several signalised intersections operating under one signal controller, are calculated using a unique method that treats each CCG as a single entity.    Graphical Interactive Offsets function Interactive Offsets function allows the user to modify Offsets...

Dr Rahmi Akçelik Dr Rahmi Akçelik is a leading scientist and software developer with 50 years of practical, research and training experience in the area of road traffic operations, traffic engineering, management and control. He is Director of Akcelik and Associates Pty Ltd - trading as SIDRA SOLUTIONS. He has more than 300 technical publications in his area of expertise. He is the author of the SIDRA INTERSECTION and SIDRA TRIP software packages. Rahmi served as member of various US Transportation Research Board Committees. He has trained several thousand professionals in over 300 workshops...

Improve the quality of your model calibration We provide Excel Applications as useful tools for field surveys of Back of Queue and Queue at Start of Green (or Start of Gap), Saturation Flow and Lost Time. These help with calibration of SIDRA models for signalised intersections, interchanges, roundabouts, sign-controlled intersections and pedestrian crossings. The survey methods in our Excel applications are consistent with the fundamentals of the traffic models used by SIDRA. This will help you to employ a sound model calibration methodology in your work.

We developed a unique method for modelling Roundabout Metering Signals for traffic and transport professionals around the world to solve complex problems for better roundabout operation. SIDRA SOLUTIONS developed a unique method for modelling Roundabout Metering Signals for inclusion in its software as commissioned by VicRoads in Melbourne, Australia (equivalent of US Departments of Transportation). Innovation was essential to this major project as there was no analytical method available for practitioners to analyse metering signals. Roundabouts with unbalanced flow patterns may have...

Our products are designed and delivered to contribute to a better world for everyone. Our business is conducted with careful consideration of the environment, for the benefit of our industry, community and employees. Delivering high quality software We provide state of the art software tools based on 40+ years of development and leading research. We have developed these continuously in response to feedback from practising transport and traffic engineers and planners around the globe. Providing a satisfying customer experience We aim to achieve and maintain a high standard of customer service...

2014 ROADS AUSTRALIA AWARD FOR TECHNICAL EXCELLENCE On 12 December 2014, Dr Rahmi Akçelik received the 2014 Roads Australia Award for Technical Excellence in recognition of the exceptional achievement of an individual in a technical or scientific area relevant to transport. About the Award Roads Australia is a non-political industry association that acts as the national peak body of Australian road transport stakeholders.  It represents the International Road Federation (IRF) in Australia and is represented on the World Executive Board of the IRF.  The following selection criteria apply for...