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What is Speed and Delay Studies in Traffic Engineering about?

Here are the steps to compare the mean speeds from before and after studies: 1. Collect spot speed data from before and after installation of traffic calming measure 2. Calculate mean speed (u1), sample size (n1), and standard deviation (s1) from before data 3. Calculate mean speed (u2), sample size (n2), and standard deviation (s2) from after data 4. Calculate pooled standard deviation: sd = √(s12/n1 + s22/n2) 5. Calculate test statistic Z: Z = (u1 - u2)/sd 6. Compare Z to critical value Zcri

Author

Riyad Arafat

Language

EN