Alshetty, Dheerij
Impact Assessment of Short-Term Interventions on Air Quality in a Megacity: A Case Study on Odd–Even Policy Implemented in Delhi City - Vol, 102(4), December - USA Springer 2021 - 1151-1159p.
Impact of the odd–even (O/E) car rationing scheme implemented in Delhi city was assessed in this study. Traffic data, ambient air quality, vehicle speed and tailpipe emissions were measured along chosen urban corridors (UC) of the central business area (UC1), institutional area (UC2), and residential area (UC3), during and post-odd–even policy implementation. The intervention resulted in reduction of peak hour traffic flow by 27.6%, 25% and 25% at UC1, UC2 and UC3, respectively. The average emissions per trip decreased at all the UCs due to increase in the average speed and subsequent reduced idling time. The ambient Particulate Matter (PM) concentration at institutional area (UC2) was found to be lower during the O/E scheme as compared to post-O/E results; however, the PM values were observed to be higher in the other two locations. The increase in ambient PM concentrations at UC1 and UC3 can be attributed to a proportionate increase in non-exhaust emissions during the O/E scheme. The findings of present study reveal that the intervention had a positive impact on tailpipe emissions but a negative influence on non-exhaust emissions, as resuspension of road dust was contributing significantly ambient PM concentrations in Delhi during the O/E policy. Field observations revealed that interventions like odd–even cannot be successfully implemented and executed without people's engagement and participation.
Civil Engineering
Impact Assessment of Short-Term Interventions on Air Quality in a Megacity: A Case Study on Odd–Even Policy Implemented in Delhi City - Vol, 102(4), December - USA Springer 2021 - 1151-1159p.
Impact of the odd–even (O/E) car rationing scheme implemented in Delhi city was assessed in this study. Traffic data, ambient air quality, vehicle speed and tailpipe emissions were measured along chosen urban corridors (UC) of the central business area (UC1), institutional area (UC2), and residential area (UC3), during and post-odd–even policy implementation. The intervention resulted in reduction of peak hour traffic flow by 27.6%, 25% and 25% at UC1, UC2 and UC3, respectively. The average emissions per trip decreased at all the UCs due to increase in the average speed and subsequent reduced idling time. The ambient Particulate Matter (PM) concentration at institutional area (UC2) was found to be lower during the O/E scheme as compared to post-O/E results; however, the PM values were observed to be higher in the other two locations. The increase in ambient PM concentrations at UC1 and UC3 can be attributed to a proportionate increase in non-exhaust emissions during the O/E scheme. The findings of present study reveal that the intervention had a positive impact on tailpipe emissions but a negative influence on non-exhaust emissions, as resuspension of road dust was contributing significantly ambient PM concentrations in Delhi during the O/E policy. Field observations revealed that interventions like odd–even cannot be successfully implemented and executed without people's engagement and participation.
Civil Engineering