Junctions (software)

[3] The program is used by traffic engineers when assessing existing layouts or when analysing the impacts of proposed design changes.

The capacity and safety relationships that ARCADY utilizes are discussed in the UK's Design Manual for Roads and Bridges.

ARCADY 9 includes built-in tools for graphically measuring roundabout geometries and for assisting with the transfer of traffic flow data from other sources (typically spreadsheets).

It is based on empirical relationships which link capacity and safety with road geometric parameters such as carriageway widths and visibilities.

More recently, an extension to the simulation mode allows the performance of simple adaptive signal control to be estimated.

Its integration with ARCADY and PICADY means that users can switch a junction between priority and signalized options and compare the results within one package.

In Junctions 10 the simulation mode capability has been extended to allow the performance of simple adaptive signal control to be estimated.

ARCADY is used to assess roundabout designs. Circulating traffic has priority over traffic entering from the approach roads.
PICADY is used to assess priority junction designs such as this T-junction. There are no signals here so right of way is determined by the road markings. The double-dashed line indicates that the grey car should give way to any oncoming traffic.