and OBU capacity=300. Figure 10 illustrates that due to congestion, travel time estimation has the least accuracy on the upstream segments s2–s4 from the 8th time interval. In both Fig. 10a, b, the highest MAPE occurs on segment 3 in the 9th time interval. A comparison of Fig. 10a and b shows that, in most cases, travel times TTCS are more accurate than TTCV on the upstream segments starting from the 8th time interval. This is because if a CV with limited OBU capacity is collecting data at a fxed rate and is stuck in a trafc jam, the OBU will be saturated with close to 0 speed readings.
and OBU capacity=300. Figure 10 illustrates that due to <br>congestion, travel time estimation has the least accuracy on <br>the upstream segments s2–s4 from the 8th time interval. In <br>both Fig. 10a, b, the highest MAPE occurs on segment 3 in <br>the 9th time interval. A comparison of Fig. 10a and b shows <br>that, in most cases, travel times TTCS are more accurate than <br>TTCV on the upstream segments starting from the 8th time <br>interval. This is because if a CV with limited OBU capacity <br>is collecting data at a fxed rate and is stuck in a trafc jam, <br>the OBU will be saturated with close to 0 speed readings.
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