The transportation sector is considered one of the major contributors to greenhouse gas (GHG) emissions in metropolitan areas, and any efforts to reduce these emissions requires strategic management of multiple transportation modes. This paper presents a method to identify opportunities to reduce GHG emissions by expanding commuter bus services and incentives to shift commuters from private cars to transit. The approach uses a nested multinomial logit model for mode choice in a region that includes driving alone, carpooling, walking, cycling, and using four possible transit modes (ferry, commuter rail, rapid transit and bus) by walk access or driving access. A model of existing conditions was calibrated with data from the Boston metropolitan area. Using an emission factor model based on average speeds from the California Air Resources Board (CARB), the net effect of new commuter bus service on GHG emissions from transportation was estimated. Potential GHG reductions are weighed against the capital and operating costs of new transit services to quantify the cost-effectiveness of a new commuter bus service for isolated origin-destination pairs. This modeling framework is used to optimize fares and bus frequency in order to identify the corridors with the most cost-effective potential for GHG reduction. Results are presented for the Boston region, demonstrating the feasibility of implementation and the potential magnitude of benefits for cost-effectively reducing GHG emissions associated with transportation. The method is general and can be applied in other cities around the world.

The purpose of this study is to explore procurement practices employed within the commuter bus industry in Gauteng. The contemporary procurement practices employed within the commuter bus industry in Gauteng have propagated a number of challenges for this industry, including a deficit in the allocated funds and a lack of coordinated relationship between the relevant stakeholders. This study is both descriptive and exploratory in nature and employed a mixed-method research approach to collect the research data. The data was collected from a sample of 18 respondents who are key stakeholders directly involved in the procurement of subsidised commuter bus services in Gauteng by means of a face-to-face interview using a semi-structured questionnaire. The findings of the study revealed that there are three types of procurement practices employed within the commuter bus industry, namely, interim, negotiated and tender contracts. However, all these contracts are now outdated, due to the complex implementation of the policies guiding procurement. The study also revealed that there are minimal contributions towards the socio-economic objectives within the commuter bus industry. This has led to uncoordinated relations between the government officials and the subsidised commuter bus operators. Furthermore, there are challenges hindering effective procurement in the commuter bus industry, such as under-funding, fronting activities, frequent reshuffling of transport personnel and inconstant allocation of funds. The study also noted differences in the application of procurement practices between the government officials and the subsidised commuter bus operators, in terms of the industry’s contribution towards socio-economic objectives, policies and regulations, relationship and the challenges faced within the industry. Efficient procurement practices can contribute significantly to the commuter bus industry, especially towards job creation and economic growth. The study concludes with a recommended framework for enhancing the procurement practices of the commuter bus services in Gauteng. / Economics / M. Com. (Transport Economics)