Abstract
The objectives of this research are to (1) investigate the fuel consumption characteristics of bus operations in bus lanes and on regular city streets; (2) identify probable causes of inefficiency, and (3) identify probable improvements. Fuel consumption data were collected by using an On-board Emissions Measurement System (OEM) on a bus while the bus is in service. Study results show that a bus in an exclusive bus lane (1) is more energy-efficient when operating in mid-blocks due to reduced friction from other road traffic; and (2) has high percent of idling time due to station and intersection delay. Improvements for enhancing both energy and operational efficiency may include redesign of traffic signaling, renovation of bus station design/operations, and eco-driving training for bus drivers. Policies for promoting use of energy-efficient bus fleet, especially at idling and acceleration/deceleration, would also be helpful in fuel savings in city street operations.
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