Problem $2\mathrm{.}6$:

Six test runs using the vehicle probe method were conducted for a travel time and delay study on a road segment spanning $4\mathrm{.}40km$ in an urban area. The summary of the collected data is shown in the Table $2\mathrm{.}7$ below.

Table $2\mathrm{.}7$: Test run data.

$\backslash$table$[[$Test No$.,$Journey time,Delay$],[1,5$min$\mathrm{.}40$Sec,$50],[2,6$min$\mathrm{.}10$Sec,$90],[3,7$min$\mathrm{.}00$Sec,$100],[4,5$min$\mathrm{.}00$Sec,$0],[5,7$min$\mathrm{.}20$Sec,$150],[6,5$min$\mathrm{.}30$Sec,$20]]$

a$)$ Calculate the average travel speed for the studied road segment;

b$)$ Calculate the average running speed for the studied road segment; and

c$)$ Provide a brief interpretation of the performance of the studied road segment.