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ROAD DRAINAGE DESIGN
Most US roads are built with a slight sideways tilt that drivers barely notice: About a 2% cross slope helps rainwater run off instead of pooling on the pavementRoadways are engineered with a gentle slope of around 2% to enhance rainwater drainage effectively. This slight tilt not only reduces the r...- How Netherlands built the 'World’s First PlasticRoad Cycle Path' using recycled plastic equivalent to 218,000 cupsThe Netherlands opened the world’s first PlasticRoad cycle path in Zwolle in 2018. The 30-metre stretch used recycled plastic equivalent to...
- In 1930, Detroit and Windsor opened an underwater road tunnel; 96 years later, the mile-long crossing still serves motorists between the two citiesThe Detroit-Windsor Tunnel, inaugurated in 1930, serves as a vital conduit for both commuters and tourists alike, linking the bustling city...
- India’s street food paradox: Cleaner cities, but where do vendors go?Street-food vendors in India are facing tighter enforcement as cities reclaim pavements and push for cleaner public spaces. But without des...
- In 2024, Arizona put 100% recycled glass beneath a 23-mile interstate expansion; the unusual material helped protect 19 sets of existing highway culvertsWhen Arizona widened Interstate 17, engineers faced a problem that drivers would never notice. Beneath the planned expansion were 19 sets o...
- In 2018, the Netherlands turned 1,000 kg of household plastic into a 30-metre cycle path; the road contained the equivalent of 218,000 plastic cupsA Dutch cycle path turned plastic waste into something useful. In 2018, Zwolle opened a 30-metre path made with about 1,000 kilograms of re...
- In 2020, Australia built more than 90% of a road project from recycled waste; five million bottles went into a job that cost no more than a standard buildIn 2020, Australia built more than 90% of a road project from recycled waste; five million bottles were used in a Central Coast Council pro...
- In 2019, Ontario's Trent University created green parking from 35,640 pounds of recycled plastic. 7 years later, the system can hold 64,627 gallons of stormwater on campusTrent University implemented permeable grid paving for parking needs. This innovative system uses recycled plastic and improves stormwater ...
- Maine buried 20,000 old tires beneath a road and they helped against frost damage. Now engineers are exploring them for walls, highways and moreIn an innovative engineering experiment, shredded tires were utilized in road construction, effectively tackling both durability and tire w...
- In 2024, Arizona engineers used 100% recycled glass to widen 23 miles of Interstate 17 at 19 sites, protecting concrete culverts built for a narrower highwayInstead of adding heavy soil and stone above aging concrete drainage structures, engineers used ultra-lightweight foam glass made from recy...
- Chicago planted a 20,300-square-foot green roof on City Hall; EPA says its surface can be about 100°F cooler than nearby conventional roofs and saves nearly $5,000 in energy each yearChicago's City Hall green roof demonstrates substantial cooling and energy savings. This innovative rooftop garden reduces surface temperat...
- In 1996, Idaho listed Fish Creek for sediment after erosion damaged aquatic habitat. 22 years later, restoration helped it earn the maximum 3.0 score for cold-water lifeFish Creek in Idaho was listed as impaired for sedimentation in 1996. Collaborative efforts by various stakeholders improved road surfaces ...
- Mary Kathleen’s uranium town still had 212 homes when its mine closed in 1982; the company settlement was dismantled and auctioned off in 1983Mary Kathleen was once a thriving community centered around a uranium mine in Queensland, complete with schools, a cinema, and numerous hom...
- In 2021, Washington's Skagit River System Cooperative installed an 80-foot bridge over the Lucas channel. 5 years later, the project has helped reconnect fish habitat across the floodplainA restoration project in Washington’s Barnaby Reach has focused on improving floodplain connectivity and fish passage by removing infrastru...
- Delhi’s roads take a beating this monsoon, with potholes and damaged stretches across key routesDelhi's roads show monsoon damage with potholes and broken surfaces. Poor drainage exacerbates water accumulation, weakening the bituminous...
- 32,600 used tires did not go to a landfill. Instead, Michigan turned them into a 1.15-mile road in Clare County that can also reduce traffic noise. The next target is Detroit roadsMichigan is turning discarded tires into road-building material, with 32,600 passenger tire equivalents reused on a 1.15-mile stretch of Ha...
- In Maine, engineers turn about 1 million scrap tires a year into lightweight highway fill; the shredded rubber stabilizes embankments built on weak marine clayInnovatively transforming shredded tyres into construction materials for highway embankments, Maine tackled substantial waste tyre pileup w...
- Kanpur-Lucknow Expressway slippages point to design issue, affected stretches need rebuilding: OfficialSlippages on the Kanpur-Lucknow Expressway suggest design issues, not construction defects. Affected stretches will require rebuilding from...
- In 2025, Hampton, New Hampshire, completed a $4.3 million drainage project using a repurposed pump station. 1 year later, residents estimated flooding had fallen 75%, transforming a flood-prone neighborhoodHampton, New Hampshire, finished a drainage project. This work significantly reduced tidal flooding for residents. New pipes and a repurpos...
- In 2018, Hamlin Street NE installed bioretention systems managing 2.6 acres in Washington, DC. 8 years later, they retain nearly 20,000 gallons per storm, improving water quality in Hickey RunHamlin Street bioretention systems are quietly changing how Washington, DC, handles stormwater. Two green infrastructure systems can retain...
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