Tech
Are bridges near you safe? This MRI-like scan may prevent disaster
Suyun Ham can’t take his eyes off a scanner. “Lower the sensors a little bit more,” Ham urges an assistant. Then a barrage of data floods in, filling computer screens for a diagnosis.
But Ham isn’t a medical doctor. Nor is his “patient” a living creature. An engineering professor from the University of Texas at Arlington, he is experimenting with a novel approach in bridge inspection.
Ham’s mobile-scanning system is part of efforts to make US infrastructure more heat-resilient. Unlike floods and tornados that can quickly destroy bridges, extreme heat is a silent killer that harms them over time, experts say.
“If temperatures are out of range, bridges can get damaged unexpectedly,” says Ham, who lives in the Dallas-Fort Worth area, where summer temperatures can exceed 100F (38C). “With our “MRI,” we can see what’s inside a bridge quickly.”
Bridge materials expand and contract in response to temperature fluctuations. While most are equipped with features to accommodate that movement, they were designed to withstand historically cooler temperatures, says Paul Chinowsky, a professor emeritus of civil engineering at the University of Colorado Boulder.
When temperatures hit a record high, bridges might behave in ways that engineers didn’t intend them to, he adds.Heat-swollen steel joints can impair the mobility of a swing bridge, making it unable to open or close—at least temporarily. Concrete also expands under heat. Once its expansion goes beyond a bridge’s original design limit, the concrete can crack, exposing it to moisture that can corrode internal metal components.
That’s an increasingly common scene around the world. In China, a concrete bridge broke in half because of brutal heat in 2022. That same year, London wrapped Hammersmith Bridge in giant pieces of foil to prevent it from overheating. And when the blistering sun baked Chicago’s DuSable drawbridge in 2018, its steel joints expanded and got stuck until firefighters hosed the bridge with cold water.
“Bridges are very susceptible,” Chinowsky says. “The hotter it gets compared to what typically it is, the more danger you have.”
‘A lot of headaches’
Hotter temperatures are baking US bridges at a time when their health is already deteriorating. The country has more than 600,000 bridges, almost half of which have exceeded their designed lifespan of 50 years, according to a 2025 report by the American Society of Civil Engineers.
With proper maintenance, many can last much longer, potentially exceeding 100 years, the industry group says. Still, about one in three bridges requires repair or replacement, according to an analysis published this year by the American Road and Transportation Builders Association.
Hussam Mahmoud, a professor at Vanderbilt University who has evaluated the structural integrity of about 90,000 steel-girder bridges across the US, found that many have aged prematurely, due in large part to the heat-accelerated malfunction of their expansion joints.
As the frequency and severity of heat waves increase with climate change, expansion joints, which connect two bridge spans, expand more often. That, coupled with the strain caused by debris or dirt accumulated in the joints over time, adds pressure to the structure, elevating the risk for a bridge to crack or buckle, Mahmoud says.
Although those defects don’t put a bridge in immediate danger of collapse, they need to be fixed to avoid further damage, which can be “a lot of headaches,” says Mahmoud.
With more than 4.9 billion trips taken across US bridges on any given day, bridge closures can take a toll on commerce and the economy, Mahmoud says. More damage also means higher maintenance costs. The US is already facing a $373 billion funding gap over the next 10 years to repair bridges properly, according to the American Society of Civil Engineers.Heat-induced damage can also cause bridges to malfunction at a time when the free movement of people is needed the most.
In June, a swing bridge in South Carolina got stuck for hours due to sweltering temperatures and was unable to open for ships to go through, delaying rescue efforts for a fatal boating accident.
Drive-by inspections
For Ham, better bridge monitoring is key. “Just like it is difficult to heal a human patient with stage-four cancer, it’d be too late to repair a bridge when there are a lot of defects,” he says.Ham, who spent a big chunk of his college time inspecting bridges, learned the limitations of the conventional method firsthand. He used to tap the bridge surface with a hammer and listen for hollow sounds that could indicate problems.
That hammer later evolved into more advanced devices, yet the time-consuming nature of manual inspection remains largely unchanged, Ham says. The conventional method also requires a bridge to shut down some of its lanes for inspection, a big ask for places such as Texas, which has 56,000-plus bridges.
While federal mandates typically require highway bridges to be inspected every two years, Ham and others at the University of Texas’s Smart Infrastructure and Testing Laboratory in Arlington want to help increase that frequency by introducing a new solution: a drive-through inspection.
Ham’s machine—a trailer loaded with dozens of electronics—is hauled by a pickup truck. On a sizzling afternoon in July, as the vehicle pulled the machine across a concrete bridge over a stream bed on the university campus, the tools generate mechanical waves that can propagate through concrete.
Sensors pick up the resulting bridge vibration signals, while a GPS device pins down where each signal comes from. Meanwhile, ground-penetrating radars emit pulses to create images of the structure under the bridge’s deck, and GoPros videotape the surface condition. The end goal, according to Ham, is to collect a wide range of data that enables engineers to identify cracks, voids and other anomalies.
The machine scanned the entire 5-feet-long bridge within seconds. By contrast, it would take hours for inspectors to complete the same job using the conventional method, according to Ham.
“There’s a lot of surface damage,” Ham says, pointing to a number of bright orange dots and stripes scattered across the dark blue background of one computer image generated from the onsite scanning. He also spots a cluster of tiny cracks, highlighted by a red rectangle.
Ham and his team then use artificial intelligence to refine the analysis and filter out “noises”—irregular vibration signals caused by a car driving by during the inspection, for instance. The engineers report their findings to bridge overseers for safety assessment and future repair work.
“It is better for time and efficiency,” says Mark Burwell, a bridge inspection coordinator at the Texas Department of Transportation whose agency has deployed Ham’s technology to inspect dozens of bridges since 2019. As inspectors no longer have to work next to moving traffic on a bridge, the automated inspection also helps put humans out of harm’s way, he adds.
For now, Ham’s “portable MRI” is only available for bridge inspection in the Lone Star state. Ham aims to scale up its deployment. To make that happen, the engineers will have to first perfect the innovation.
There have been many learning moments, Ham recalls. Once, a rough ride knocked off sensors, cutting an inspection mission short. (The machine is now equipped with a lift that lowers and raises it to avoid obstacles on the road.) On another occasion, the software grappled with the complexity of decoding signals from a concrete bridge covered with asphalt patches.
To help the AI better interpret signals, Ham and his team have turned their laboratory into a manufacturing hub of artificial defects. There, engineers soak metal sticks in brine to emulate corrosion. They also drill holes in concrete slabs to mimic cracks. By applying sensors and radars to examine those artificial defects, the engineers can pair different signals with different types of damage.
Even so, the machine is unlikely to catch all the heat-induced problems, according to Ham. For instance, searing temperatures can stress a bridge, but the machine can’t detect it until physical damage occurs.
But data collected from damaged bridges may pave a way for future protection, Ham says. That’s because, by comparing the number of cracks in bridges built with different methods and materials, the technology plays a role in helping regulators determine how to design structures more suitable for a hotter world.
“We’re like a medical doctor,” Ham says. “We can help them make a decision.”
2025 Bloomberg News. Distributed by Tribune Content Agency, LLC.
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Tech
Almost 90% of women leave tech industry within 10 years | Computer Weekly
Almost 90% of women choose to leave their tech career within 10 years of starting it, according to research from Akamai.
The tech services provider found that more than half of women leave their tech roles within the first five years of their career, and almost 90% within 10, making the average career length for a woman in tech in the UK six years. But the research also found that women would be willing to return to their tech career under the right circumstances.
Natalie Billingham, EMEA managing director at Akamai, said: “These insights illustrate that the UK tech industry has a window of opportunity to impact the choices of women in tech – from the past and present, and in the future.
“By providing opportunities for progression, flexible work and appropriate remuneration, tech leaders on the precipice of technological innovation have the chance to create impactful change on the tech workforce, fostering longer-lasting tenures, diverse leadership and an environment where women can thrive.”
The stagnant number of women in the UK’s technology sector is nothing new, with previous research finding multiple reasons why the tech industry cannot retain women workers even when it has succeeded in the equally difficult task of attracting them.
As well as a lack of visible and accessible role models, poor opportunities for career progression and lack of flexibility are reasons women often cite for opting out of the tech industry. The top reason women gave for quitting their tech roles was a lack of inclusive culture.
More than 50% said they left because they didn’t feel as though they belonged, 40% said it was because of a lack of gender diversity in leadership positions, and 10% said gender bias played a role in their exit from the technology sector.
Nearly three-quarters of women cited a lack of career progression as playing a part in their decision to leave the sector, while 19% stated it was their definitive reason for moving away from tech.
Flexible working has been an ongoing challenge for women in the technology sector, who often leave because they cannot balance working in an inflexible workplace when they often carry a disproportionate amount of the care burden at home.
More than half of women who have left the sector said they did so because of stringent working hours, with 15% outlining that there was no ability to work flexibly and more than 40% stated there was a lack of work-life balance. This could tie in with the 19% of women who said their main reason for leaving tech was due to burnout and a negative impact on their mental health.
Out of the large number of women who have left the technology sector, 15% are currently not working, while 13% moved into finance, 13% moved into teaching, and 12% chose to work in healthcare.
Just over 30% said they left the technology industry of their own volition and prefer their new employment situation, while many said they had no plans to return to tech.
But almost 40% claimed they would be willing to come back to their technology career under the right circumstances, of which pay, career progression and better flexibility were key factors. Just under 20% said better opportunities for career progression could entice them back to tech, while 48% said a higher salary would be the defining factor in their decision to return, and 38% would come back for better flexibility.
Out of those who have come back to the sector after having left, more than half did so because of an increase in pay, and 43% did so because of renewed opportunities for career progression.
Over 40% also claimed they returned to their tech career because they were given better work-life balance, and 37% of women who have left tech said they would consider returning to the industry if they were able to work flexibly, such as working part-time, job sharing or hybrid working. Those who have returned 90% said they’re likely to stay at least two more years if not more.
Hazel Little, CEO of Career Returners, said: “The findings provide a valuable picture of what mid‑career women are looking for to return to tech, and it’s encouraging to see that the majority could be persuaded to come back under the right conditions.
“Progression pathways are crucial for retaining talent, but equally important is ensuring that women who want to return have clear, supported ways to re-enter the sector in the first place. When employers build both return pathways and progression pathways, they create an environment where women can come back, grow and stay.”
Tech
Port of Tyne advances connected mobility, autonomous logistics | Computer Weekly
The North East Automotive Alliance (NEAA), alongside the Port of Tyne, autonomous driving technology provider Oxa and a consortium of leading industry and academic partners, has delivered the Port‑Connected and Automated Logistics (P-CAL) project.
The Port of Tyne is one of the UK’s major deep-sea ports handling specialised bulk and containerised products, alongside delivery logistics, and assisting growing passenger numbers via its International Passenger Terminal.
Overall, the Port of Tyne adds £658m to the local economy, supporting 10,400 jobs directly and indirectly, and as one of the UK’s largest trust ports. Fully self-financing, it runs on a commercial basis, reinvesting all of its profits back into facilities along the River Tyne for the benefit of the North East and its stakeholders.
Delivered and funded through the UK government’s CAM [Connected and Automated Mobility] Pathfinder programme, NEAA – a collaborative, industry-led cluster dedicated to fostering a competitive and sustainable environment for businesses – is working with its partners to deliver P-CAL to demonstrate autonomous container transport at the Port of Tyne. The initiative will see the deployment of a fully autonomous terminal tractor and secure mesh communication network to move containers between the dockside and the container compound, creating a UK first in waterside port automation.
P-CAL was designed to push the boundaries of autonomous logistics by deploying and validating a fully autonomous terminal tractor in a live port environment. Building on the North East’s earlier 5G CAL and V‑CAL initiatives – which looked to assess the commercial viability of deploying autonomous yard tractors on the Vantec-Nissan route in Sunderland – the project worked to move autonomous technology from proof‑of‑concept trials into a complex, safety‑critical, real‑world operational setting.
Over the course of the project, the consortium is said to have successfully designed, integrated and tested an autonomous container transport service capable of operating on a busy quayside. The scope of work included the deployment of a fully autonomous terminal tractor; a resilient mesh communication network; the capability to integrate with terminal operating systems; real‑time coordination with live crane movements; and the implementation of a cyber security framework to enable safe, remote and automated operations.
The system was developed and tested in a newly defined and highly complex operational design domain. This is said to reflect the realities of a working port environment where traffic density, variable conditions and human interaction present unique challenges.
The regional and national partnership delivering the project combined expertise across autonomous systems, logistics, cyber security, academia, legal compliance and industrial operations. The consortium believes its project has generated valuable technical, operational and regulatory insight that will inform the future deployment of CAM services across ports, logistics hubs and industrial sites nationwide.
By augmenting the capability of the existing workforce, it says it has shown that autonomous systems can take on repetitive or more hazardous tasks, allowing skilled workers to focus on higher-value roles. This is seen as particularly vital for the North East, ensuring the region remains at the forefront of industrial evolution while creating a more resilient and tech-enabled labour market.
“Delivering autonomous logistics in a live port environment has been a major step forward for the sector,” said Graeme Hardie, operations director at the Port of Tyne. “P-CAL has shown what’s possible when innovation is applied to real operational challenges, improving safety, efficiency and sustainability. The Port of Tyne is proud to have played a leading role in a project that will influence how ports across the UK and beyond approach automation.”
Oxa founder and CEO Paul Newman added: “The success of P-CAL proves how autonomy will enable the future of resilient logistics operations. Through the project, we’ve demonstrated that existing work vehicles can be turned into a digital workforce – successfully completing autonomous container movements in a dynamic quayside environment, while providing worksite intelligence necessary for real-time industrial optimisation. P-CAL provides a blueprint for how ports and industrial hubs worldwide can deploy autonomous technology to drive productivity, efficiency and safety.”
CAM Pathfinder is funded by the UK government, delivered by the Department for Business and Trade in partnership with automated mobility firm Zenzic and Innovate UK, the UK’s national innovation agency.
Zenzic programme director Mark Cracknell said: “P-CAL is a strong example of how government and industry can work together to accelerate the commercial readiness of CAM technologies. Projects like this are vital in turning innovation into deployment, creating high‑value jobs and ensuring the UK remains globally competitive in connected and automated mobility. As the project closes, the outcomes and learning from P-CAL will continue to shape future CAM initiatives, investment opportunities and policy development, both regionally and nationally.”
The next phase of the project will examine how the system performs across broader port operations, including the added pressures of multiple vehicles working alongside people, equipment and live commercial activity.
Tech
‘STAGED’: Conspiracy Theories Are Everywhere Following White House Correspondents’ Dinner Shooting
In the immediate aftermath of the attack on the White House Correspondents’ Dinner on Saturday night, influencers, pundits, and random posters lit up social media platforms like X, Bluesky, and Instagram with conspiracy theories about the attack and the alleged shooter.
Both left and right-wing accounts claimed, without evidence, that the attack was staged.
President Donald Trump, Vice President JD Vance, and dozens of other high-profile administration officials and journalists were attending the dinner at the Hilton hotel in Washington, DC, when a suspect, later identified by media reports as Cole Tomas Allen from California, allegedly ran past security towards the event. He was detained by law enforcement while the president and vice president were evacuated. Police said that they believe Cole acted alone, but did not expand on who his intended target was or what his motive may have been. “We believe the suspect was targeting administration officials,” acting attorney general Todd Blanche told NBC’s Meet the Press on Sunday morning.
On Bluesky, which has a predominantly left-leaning user base, many people simply wrote the word “STAGED” over and over again, echoing the response to the Trump assassination attempt in Butler, Pennsylvania in 2024.
On X, many claimed the shooting was staged as a way to bolster support for Trump’s plan to build a new ballroom in the White House. The president referenced the ballroom in a press conference after the incident and a Truth Social post on Sunday morning. Many prominent online Trump boosters echoed the need for the ballroom, including far-right podcaster Jack Posobiec, Libs of TikTok creator Chaya Raichik, and Tom Fitton, the right-wing activist who runs Judicial Watch.
Their quick response, conspiracy theorists claimed, was evidence of a coordinated campaign following the shooting. “Is this another staged event,” one X user asked in a post that has been viewed more than 5 million times.
Other social media users who claimed the incident was staged pointed to a Fox News clip that featured the station’s White House correspondent Aishah Hasnie speaking from the Hilton hotel. Hasnie told viewers that prior to the shooting, press secretary Karoline Leavitt’s husband allegedly told her “you need to be very safe,” before the call was cut off.
“Fox News just cut one of their reporters off as they seemed to indicate the shooting was a pre-planned false flag,” one X user wrote in a post that has been viewed more than 2 million times. Hasnie later clarified in an X post that her cell service had cut out in a location with notoriously bad service, adding: “He was telling me to be careful with my own safety because the world is crazy. He was expressing his concern for my safety.”
“I don’t want to be fomenting conspiracies,” wrote Angelo Carusone, the chair and president of Media Matters, on Bluesky about the Fox News interview. “But I mean…this was super weird. Super weird.”
Leavitt herself was also the focus of conspiracy theories after she said “shots will be fired” in an interview ahead of the dinner, referring to the jokes Trump was scheduled to deliver. Following the attack, X users claimed the comment was “strange,” “sus,” or a “curious choice of words,” while sharing memes that suggested the shooting was staged. At least one mainstream outlet appeared to amplify the conspiracy theory as well, describing Leavitt’s comment as “eerie” and “bizarre.”
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