Majority of management strategies today are still introduced for reducing congestion and improving safety. As a result, the evaluation of their impacts usually focuses on congestionrelated indicators, such as total time spent, total travel distance or mean speed. However, with the growing prosperity, consumers demand higher quality transport services, for which reliable transport networks are central. This paper is focused on the evaluation of the ramp metering impact based on both indices: traffic and the travel time reliability on the A6W motorway in Paris. Three strategies are implemented, tested and evaluated. Evaluations include more traditional traffic impacts on one hand and the travel time reliability evaluation on the other which corresponds to the add value of this paper. The results obtained indicate both improvement of the travel time reliability and the average travel time.

A new method to project the impacts of global trade scenarios on international freight flows is presented. The model uses international trade scenarios developed by the Economics Department of the Organisation for Economic Co-operation and Development for the period 2004–2060 with alternative liberalization scenarios. A global freight network model is developed, and current exports data from Eurostat and the United Nations Economic Commission for Latin America and the Caribbean are used to calibrate a model converting trade in value into freight volumes (in tonne-kilometers) assigned to a routable transport network for the period 2010–2050. The results highlight the impact of changes in global trade flows and carbon dioxide emissions related to international trade and raise several policy implications. The outputs suggest that increases in transport flow will be significant, especially within Asia and on routes used for export–import activities from and to this region.

This paper presents long-term scenarios on the development of urban passenger mobility and related carbon dioxide (CO2) emissions by 2050 in global cities that have populations greater than 300,000 on the basis of the International Transport Forum’s new global urban passenger transport model. Results from the policy scenarios analysis show that in the baseline scenario total motorized mobility and related CO2 emissions in cities will grow by 94% and 27% in 2050 compared with 2015. The share of private cars will continue to increase in developing regions while slightly decreasing in developed economies. Policy measures exist to fulfill mobility demand while reducing the carbon intensity of travel. Technology contributes the most to the CO2 mitigation in the most transit-oriented scenarios. Behavioral policies such as fuel tax, lower transit fares, and controlled urban sprawl can bring the additional mitigation efforts required to make cities sustainable and are essential to combat congestion and health issues.

Despite the importance of reliability, few countries monitor it or explicitly incorporate it into transport policy making. Nevertheless, a number of policy options are available to improve this aspect of transport management. Active management of the network through ramp metering is recognized as an efficient way to control motorway traffic and improve average travel time. Far less is said about the reliability benefits of ramp metering. This paper assesses reliability benefits of ramp metering on the basis of a before-and-after study on the A6W, a French motorway near Paris. Several indicators for travel time variability are applied before and after the introduction of ramp metering. For purposes of taking reliability into account in policy impact evaluation, cost–benefit assessment provides a consistent framework within which to assess the monetized benefits. The monetary value of the reliability benefits of ramp metering is therefore calculated, and the policy implications of the results are discussed. The results suggest that in addition to providing gains in average travel time, ramp metering significantly improves reliability of travel times. It is also proposed that indices such as buffer time or planning time are useful for communicating the results, both for network operators and for users. Failing to unbundle the time-savings benefits of a project between average travel time and the variability in travel time is likely to lead to suboptimal policy solutions. Managing existing capacity better can be a cost-effective way to improve both average travel time and the variability in travel time.

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