quickGreen is an innovative software tool to help signal engineers measure and calculate phase intergreens for traffic signal junctions. The software is designed not only to speed up the measurement process but also to reduce errors, improve the ease of checking of intergreens and assist with archiving intergreen calculations.
The quickGreen process for determining intergreens is as follows: - A drawing of the junction is imported into quickGreen from any of the usual sources including AutoCAD, a PDF, satellite imagery or even a scanned drawing.
- After importing the drawing is calibrated to a known scale within quickGreen.
- Lanes, Turning Movement Paths, and Pedestrian Crossings are added by overlaying them on the scaled drawing. Turning Movement Paths can be easily refined to fit any geometry using typically one or two control points on the path.
- As the model is built up, quickGreen will automatically locate intergreen conflict points and measure distances between stop lines and conflict points, as required by the calculation method described above. This results in X distances for the critical conflict points.
- Traffic signal Phases are added to group lanes controlled by the same Phase.
- The critical X distances are used to calculate a Phase Intergreen Matrix using the lookup table in the UK Traffic Signs Manual, Chapter 6.
- Calculated intergreens can be overridden and adjusted if necessary and notes can be added to explain why adjustments have been made.
- The Intergreen Matrix can be exported to LinSig or other signal design software.
- Traffic - Pedestrian and Pedestrian - Traffic Intergreens can also be calculated.
- A detailed PDF report showing how the intergreens were calculated as well as the final Intergreen Matrix can be produced.
- quickGreen can easily accommodate changes to Junction geometry. As lanes or turn paths are moved conflict distances and intergreens are instantly recalculated allowing the effects of changes to Junction geometry to be quickly evaluated.
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