The problem of unsafe drinking water afflicts poor communities most.
Just as America's highways, sewage systems and water pipes need fixing, so does the growing gap between rich and poor. Trump and the Democrats could use that money to address both.
Fixing cracks and potholes in concrete roads like this one may be easier with help from bacteria.
Patching concrete sidewalks, roads and bridges after every season of snow and ice is expensive. A team of engineers is now testing a new approach harnessing bacteria to patch the potholes and cracks.
The Morrison government’s infrastructure budget favours Victoria, in a change from recent budgets.
Despite boasts of 'record' infrastructure spending, relative to GDP it's comparable to previous budgets. What's different is that Treasurer Frydenberg has chanced his arm more over the longer term.
The Morrison government’s packaging of a bundle of roads spending as “urban congestion” measures is an acknowledgement that transport planning has been inadequate.
The focus on roads reflects the fact that this infrastructure program lags well behind the growth of our biggest cities, resulting in less-than-ideal transport patterns.
Commuters at Epping train station board replacement buses during work on the line for the Sydney Metro, the biggest of all the promised projects.
The major parties are promising projects costing tens of billions of dollars, with a surprisingly large overlap between them. Yet only two have been endorsed by infrastructure authorities.
Cycling advocates set up ‘ghost bikes,’ like this one in Brooklyn, in memory of bikers killed in traffic.
US cities were designed and engineered around cars. Now some are working to increase walking and biking, but the shift isn't easy.
Spraying salt onto roads is a safety measure.
When it snows, it pours – but why do municipalities treat the roads with salt? A chemist explains how salt affects water and ice.
Transport promises stretching as far as the eye can see: Victorian Labor’s big one is a $A50 billion suburban rail loop.
Whichever party wins, Victoria's new government will have promised the biggest transport infrastructure project in Australian history. So what are the promises and are they backed by proper assessment?
Rift Valley Road in Ethiopia.
Smart roads in Africa could help reduce the impact of flooding and other disasters that affect rural communities.
When a stream enters a culvert, the flow can be concentrated so much that water flows incredibly fast. So fast, in fact, that small and juvenile fish are unable to swim against the flow and are prevented from reaching where they need to go to eat, reproduce or find safety.
Our new invention tackles one of the greatest impediments to fish migration in Australia: culverts, those tunnels or drains often found under roads.
One of Cape Town’s infamous “unfinished highways”.
Various attempts have been made to complete Cape Town's Foreshore Freeway scheme. A new approach is needed.
A road to nowhere?
Robert B.D. Brice/Wattway
Solar roadways have been promoted as a way to fight climate change, put people to work and make driving safer. But on closer inspection the reality is less than impressive.
Bumps in the road are dangerous, expensive and difficult to fix.
The East-West Link is only one example of myriad infrastructure projects that have caused community controversy.
Courtney Biggs/AAP One
We need to consider why transport infrastructure is so controversial, and how politicians can ensure they have the public's trust when making announcements for all transport projects.
There are more than 50,000 public bridges in Australia. (The Sea Cliff bridge is one Australia’s newer bridges, built in 2005).
Australian bridges are generally safe, but we don't have transparent information about how often they're inspected or maintained.
The Ponte Morandi bridge, Genoa, after its collapse, which has claimed dozens of lives.
Bridge engineering does not end when construction finishes and traffic starts to flow.
An aerial view of Seligman, Arizona, looking west, dated March 12, 1971. Route 66 bisects the town.
James R. Powell Route 66 Collection/Newberry Library
'The Mother Road' is one step closer to becoming a National Historic Trail, which would allocate funds for struggling towns along the original Route 66.
The settings on traffic lights make pedestrians wait longer by giving higher priority to vehicle traffic.
Abaconda Management Group/Wikimedia
Everyone doesn't simply wait their turn at traffic lights. Signals are set up to enable a 'green wave' for cars and adjust to heavy traffic, making walkers wait longer no matter how many there are.
Fractured concrete pavement slabs on a street in Canton, Mich.
'Bendable concrete' is not an oxymoron. Mimicking designs found in nature, engineers are making concrete that gives under stress without shattering – an advance that could improve US infrastructure.
In a pre-election budget, we can expect infrastructure politics to triumph over policy, yet again.
Australia does need infrastructure to spur growth and support jobs - that idea comes with a big "but".