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In a world with extensive and rapid urbanization and changing climate, transportation systems present major challenges and as well provide great opportunities for enhancing and promoting urban sustainability.Transportation decisions and practices have considerable direct and/or indirect impacts on urban society, economy, and environment, both positive and negative, for example through changes in travel time and economic productivity, urban connectivity, emissions and attendant air quality concerns, traffic accidents, and noise pollution as well as water quality issue, heat island effects, and climate change.Sustainable transportation technology and policy are urgently needed to mitigate the negative environmental impacts from transportation and promote the green economy through smart growth.In this focus issue, the guest editors invited professionals and experts worldwide to address infrastructure sustainability.Eight selected papers written by the authors from US, Canada, China, South Africa and South Korea are published in this issue covering eight distinct topics: (1) energy harvesting from pavements; (2) recycled pavement materials; (3) pervious pavements: (4) pavement texture and rolling resistance; (5) pavement impacts on vehicle fuel consumptions; (6) life-cycle cost analysis; (7) impacts of implementing congestion charging on driver's commute choice; and (8) sustainable transportation planning and public policies.With the intention of blazing out, inspiring, and sustaining a continuous dialogue on sustainable infrastructures, we organize this focus issue to highlight some exemplary approaches or case studies which promote sustainable developments of transportation systems for enhancing life quality and improving environments.
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Li et al. (2015) studied this question.
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