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Roads and water are generally seen as enemies, with water
responsible for most of the damage to roads, and roads being a
major cause of problems such as erosion, waterlogging, flooding,
and dust storms. This tension, however, can be reversed. The
concept of Green Roads for Water (also known as 'Green Roads' or
'roads for water') places roads in the service of water and
landscape management and climate resilience without sacrificing or
diminishing their transport functions. With global investment in
roads of US1 - 2 trillion per year, plus maintenance costs, the
widespread adoption of Green Roads approaches can leverage
investment at a transformative scale, making road development and
maintenance a vital tool for achieving climate resilience, water
security, and productive use of natural resources. Green Roads for
Water: Guidelines for Road Infrastructure in Support of Water
Management and Climate Resilience provides strategies to use roads
for beneficial water management tailored to diverse landscapes and
climates, including watershed areas, semiarid climates, coastal
lowlands, mountainous areas, and floodplains. The underlying
premise of Green Roads is therefore quite simple: designing roads
to fit their natural and anthropomorphic contexts; minimize
externalities; and balance preservation of the road, water
resources, landscape, and soil resources will usually cost less
than traditional protective resilience approaches and will produce
more sustainable overall outcomes
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