Indicación del rendimiento

As mentioned earlier, a novel feature of this study is also the development of Abu Dhabi driving cycle for both buses and cars. Table 5.3 and below present the general characteristics of the mixed traffic corridors in Abu Dhabi. These characteristics are discussed below. These characteristics include the average journey time, average journey speed, average journey acceleration, average journey deceleration, standard deviation and coefficient of variation (COV).

Table 5.3: Characteristics of the mixed traffic corridors in Abu Dhabi

5.4.1 Journey travel time

The average journey times for the mixed-traffic corridors have been calculated and analysed. Firstly, for the mixed-traffic corridor (Airport Road), the average journey times during peak hours for buses were 544.9 sec (inbound) and 422.8 sec (outbound), and for cars were 252.64

Corridors

Time

Mode Direction Average Time (Sec) Average Speed (Km/h) Average Length (Meter) Average Acc (m/sec2₎ Average Dec (m/sec2₎

Airport Road (mixed traffic road) 6.30.-7.30 am Car Inbound _{252.64 35.628 2387.998 0.83 -0.94} SD _{64.348 7.342 109.843 0.082 0.128} COV _{0.254 0.206 0.045 0.099 -0.136} Outbound 171.96 44.832 2089.216 0.702 -0.968 SD 59.256 5.301 642.876 0.143 0.604 COV 0.344 0.118 0.307 0.204 -0.623 Bus Inbound 544.9 15.61 2331.912 0.826 -0.876 SD 81.33 1.878 201.623 0.11 0.118 COV 0.149 0.12 0.086 0.133 -0.135 Outbound 422.8 19.907 2302.241 0.838 -1.273 SD 56.667 2.918 130.622 0.086 0.692 COV 0.134 0.146 0.056 0.103 -0.543 11.00-12.00 pm Car Inbound 188.35 45.609 2364.854 0.683 -0.886 SD 22.335 4.195 114.222 0.194 0.17 COV 0.118 0.091 0.048 0.285 -0.192 Outbound 167.9 33.2841 1573.809 0.8215 -1.178 SD 77.082 7.342 860.927 0.065 0.714 COV 0.459 0.22 0.547 0.08 -0.606 Bus Inbound 437.42 19.127 2248.493 0.841 -1.258 SD 82.297 3.801 103.693 0.085 0.476 COV 0.188 0.198 0.046 0.101 -0.378 Outbound 332.17 25.765 2359.612 0.81 -1.568 SD 32.689 2.31 69.428 0.061 1.087 COV 0.098 0.089 0.029 0.076 -0.693

Eliktra Road (mixed traffic road) 6.30.-7.30 am Car Inbound _{209.69 30.552 1762.837 0.935 -3.38} SD _{25.257 3.189 101.124 0.114 4.376} COV _{0.12 0.104 0.057 0.122 -1.294} Outbound 176.4 35.553 1718.947 0.946 -3.233 SD 23.879 4.397 97.709 0.143 3.165 COV 0.135 0.123 0.056 0.152 -0.979 Bus Inbound 320.29 20.697 1821.542 0.85 -1.081 SD 37.225 2.247 42.007 0.141 0.402 COV 0.116 0.108 0.023 0.166 -0.372 Outbound 408.17 16.315 1840.657 0.917 -1.304 SD 43.376 1.126 107.873 0.101 0.396 COV 0.106 0.069 0.058 0.111 -0.303 11.00-12.00 pm Car Inbound 203.033 33.459 1789.443 0.899 -1.441 SD 40.822 9.995 84.502 0.055 1.265 COV 0.201 0.298 0.047 0.062 -0.877 Outbound 207.777 27.737 1572.042 1.004 -3.529 SD 35.561 4.123 141.031 0.161 3.787 COV 0.171 0.148 0.089 0.16 -1.073 Bus Inbound 291.47 20.636 1649.049 0.867 -1.057 SD 35.144 3.164 151.085 0.133 0.325 COV 0.12 0.153 0.091 0.154 -0.307 Outbound 342.71 15.376 1444.897 1.075 -2.318 SD 66.402 1.79 212.433 0.258 1.543 COV 0.193 0.116 0.147 0.24 -0.665

sec (inbound) and 171.96 sec (outbound). During off-peak hours, average journey time for buses was 437.42 sec (inbound) and 332.17 sec (outbound), and for cars was 188.35 sec (inbound) and 167.9 sec (outbound).

For the mixed-traffic corridor (Elektra Road), the average journey time during peak hours for buses was 320.29 sec (inbound) and 408.17 sec (outbound), and for cars was 209.69 sec (inbound) and 176.4 sec (outbound). During off-peak hours, average journey time for buses was 291.47 sec (inbound) and 342.71 sec (outbound), and for cars was 203.033 sec (inbound) and 207.777 sec (outbound).

Figure 5.11 shows the total travel time during the period of data collection for each of the modes on different corridors. The figure shows that the travel time is significantly high for buses on both the roads during all times. It depicts that the buses have considerably higher travel time and are not very attractive mode of transport especially in peak hours. It can be expected that with the provision of dedicated bus lanes, the situation would improve and the travel time of buses would decrease as compared to other modes and thus making public transport more attractive. The results show that the buses have travel times on average more than almost 2.5 times higher than the travel times of cars. Bus lanes use a dedicated portion of road area and would be expected to provide considerable improvements in terms of travel time for their appraisal.

Figure 5.11: The total average travel time during the period of data collection for each of the mode on different corridors

However, there should be careful consideration about the geometry and traffic structure in addition to volumes before provision of any such TDM measure.

5.4.2 Journey speed

The average journey speeds for the mixed-traffic corridors have also been calculated and analysed. Firstly, for the mixed-traffic corridor (Airport Road), the average journey speeds during peak hours for buses were 15.61 km/hr (inbound) and 19.907 km/hr (outbound), and for cars were 35.628 km/hr (inbound) and 44.832 km/hr (outbound). During off-peak hours, average journey speed for buses was 19.127 km/hr (inbound) and 25.765 km/hr (outbound), and for cars was 45.609 km/hr (inbound) and 33.284 km/hr (outbound).

For the mixed-traffic corridor (Elektra Road), the average journey speed during peak hours for buses was 20.502 km/hr (inbound) and 16.873 km/hr (outbound), and for cars was 30.552 km/hr (inbound) and 35.553 km/hr (outbound). During off-peak hours, average journey speed for buses was 20.636 km/hr (inbound) and 15.376 km/hr (outbound), and for cars was km/hr 33.459 (inbound) and km/hr 27.737 (outbound).

Figure 5.12 shows the speeds of cars and buses during the period of data collection on different corridors. The figure shows that the speed of buses is significantly lower than cars on all roads during all times. The speed of buses improves in the non-rush hours but that too is not much improved. On the other hand in rush hours the speeds are less than half of the speeds of cars which make the buses very unattractive during peak hours.

Figure 5.12: The average speeds of cars and buses during the period of data collection on different corridors

5.4.3 Journey length

The average journey length for the mixed-traffic corridor (Airport Road), during peak hours for buses were 2331.912 meters (inbound) and 2302.241 meters (outbound), and for cars were 2387.998 meters (inbound) and 2089.216 meters (outbound). During off-peak hours, average journey length for buses was 2248.493 meters (inbound) and 2359.612 meters (outbound), and for cars was 2364.854 meters (inbound) and 1573.809 meters (outbound).

For the mixed-traffic corridor (Elektra Road), the average journey length during peak hours for buses was 1821.542 meters (inbound) and 1840.797 meters (outbound), and for cars was 1762.837 meters (inbound) and 1718.947 meters (outbound). During off-peak hours, average journey length for buses was 1649.049 meters (inbound) and 1444.897 meters (outbound), and for cars was 1789.443 meters (inbound) and 1572.042 meters (outbound).

Figure 5.13 shows the length during the period of data collection on different corridors. This can be used to compare the sections under study for data collection. The lengths of the routes are comparable and are found to be satisfactory for further analysis.

Figure 5.13: The average length during the period of data collection on different corridors

5.4.4 Average journey acceleration

The average journey acceleration on the mixed-traffic corridor (Airport Road), during peak hours for buses was 0.826 m/sec2 (inbound) and 0.838 m/sec2 (outbound), and for cars was 0.83 m/sec2 (inbound) and 0.702 m/sec2 (outbound). During off-peak hours, the average journey acceleration for buses was 0.841 m/sec2 (inbound) and 0.81 m/sec2 (outbound), and for cars was 0.683 m/sec2 (inbound) and 0.821 m/sec2 (outbound).

Whereas the average journey acceleration on the mixed-traffic corridor (Elektra Road), during peak hours for buses was 0.85 m/sec2 (inbound) and 0.917 m/sec2 (outbound), and for cars was 0.935 m/sec2 (inbound) and 0.946 m/sec2 (outbound). During off-peak hours, the average journey acceleration for buses was 0.867 m/sec2 (inbound) and 1.075 m/sec2 (outbound), and for cars was 0.899 m/sec2 (inbound) and 1.004 m/sec2 (outbound).

Figure 5.14 shows the average journey acceleration during the period of data collection for each of the modes on different corridors. The figure shows that the average journey acceleration for buses is almost same as compared to cars during all times.

Figure 5.14: The total average acceleration during the period of data collection for each of the mode on different corridors

5.4.5 Average journey deceleration

The average journey deceleration on the mixed-traffic corridor (Airport Road), during peak hours for buses was -0.876 m/sec2 (inbound) and -1.273 m/sec2 (outbound), and for cars was - 0.94 m/sec2 (inbound) and -0.968 m/sec2 (outbound). During off-peak hours, the average journey deceleration for buses was -1.258 m/sec2 (inbound) and -1.568 m/sec2 (outbound), and for cars was -0.886 m/sec2 (inbound) and -1.178 m/sec2 (outbound).

Whereas the average journey deceleration on the mixed-traffic corridor (Elektra Road), during peak hours for buses was -1.081 m/sec2 (inbound) and -1.304 m/sec2 (outbound), and for cars was -3.38 m/sec2 (inbound) and -3.233 m/sec2 (outbound). During off-peak hours, the average journey deceleration for buses was -1.057 m/sec2 (inbound) and -2.318 m/sec2 (outbound), and for cars was -1.441 m/sec2 (inbound) and -3.529 m/sec2 (outbound).

Figure 5.15: The total average deceleration during the period of data collection for each of the mode on different corridors

Figure 5.15 shows the mixed results for the average journey deceleration for buses and cars during all times. On Airport Road the cars in general have higher deceleration phases whereas at Elektra road the buses have higher deceleration phases.

5.5 Summary

This chapter presented the preliminary analysis from the assessment of the bus traffic corridors in Edinburgh and the traffic calming corridors in Edinburgh and Abu Dhabi. This data is used for the development of the driving cycle in both cities. Data was collected for the buses and cars on the “bus traffic corridors” in Edinburgh, “traffic calming corridors” in Edinburgh as well as for buses and cars on the “traffic corridors” in Abu Dhabi. The results of the characteristics of the buses and cars on the bus traffic corridors in Edinburgh have been presented and briefly discussed. The measurements were carried out for each of the three corridors during peak (8.00-9.00 am) and off-peak (2.00-3.00 pm) hours of traffic as well as before the bus lane operation (6.30-7.30am). The measurements were repeated for both directions of traffic flow on each corridor as well (that is inbound and outbound). The general characteristics of the bus traffic corridors in Edinburgh and Abu Dhabi have been presented. These characteristics are further discussed in the following chapters. These characteristics include the average journey time, average journey speed, average journey acceleration,

average journey deceleration, standard deviation and coefficient of variation (COV). Further analysis of the results and the driving cycles are presented in the following chapters.