Frequently Asked Questions (FAQs)

The following table shows a list of FAQs for COBA and QUADRO. To view the answers click 'view details' next to the question of interest.

Question Applicable Products  
Error 2431 is reported at the end of the data file COBA 11
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Switching between High and Low Traffic Growth, or between High and Low Economic Growth, makes no difference to the results COBA 11
QUADRO 4
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I want to model links attached to a Major-Minor priority junction as pairs of one-way links, but this data is rejected by COBA. COBA 11
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Program fails to run, but there are no errors in the PRN output (or no PRN output has been produced) COBA 11
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User gets error stating that ‘stages must be consecutive and ascending’ when trying to enter data for a signalised junction. COBA 11
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User specified a Maximum Delay, but average delays shown by QUADRO are much higher than this. QUADRO 4
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