‘E-highways’ could slash UK road freight emissions, says study

The UK could eliminate the majority of the carbon dioxide emissions from road freight by installing overhead charging cables for electric lorries on “e-highways” across the country, a report by government-funded academics suggests.

The plan for a so-called electric road system would cost GBP19.3bn and put all but the most remote parts of the UK within reach of the trucks by the late 2030s, with the potential for the investment to pay for itself within 15 years, according to the report by the Centre for Sustainable Road Freight. The centre is backed by government research grants and industry partners including Tesco, Sainsbury’s and John Lewis.

The catenary cables, powered by the national electricity grid, would link to lorries driving in the inside lanes on 4,300 miles (7,000km) of UK roads through an extendable rig known as a pantograph – similar to those on the top of electric trains. The electricity would power the lorry’s electric motor, as well as recharging an onboard electric battery that would power them to their destinations beyond the electrified roads.

The three-phase proposed rollout of the ‘UK Electric Motorway System’

The engineering company Siemens and the lorrymaker Scania have already carried out extensive tests of e-highway electric road systems in Germany, Sweden and the US.

Officials from the UK’s Department for Transport were scheduled to visit the test sites in Germany in March, but the trip was postponed because of the coronavirus pandemic.

The road freight sector is a large contributor to the climate crisis, accounting for 5% of the UK’s carbon dioxide emissions in 2018, according to government figures, as well as pollutants from diesel engines that harm human health. Road transport was the sector with the largest increase in global greenhouse gas emissions over the last decade, according to the Committee on Climate Change, which recommended on-road charging for lorries in its latest report to parliament.

Battery-powered electric lorries and vans are already viable options for the short-range deliveries in urban areas that make up about a third of road freight usage. However, the other two-thirds – long-haul deliveries by lorries – are difficult to decarbonise because of range and weight requirements. The lithium ion batteries used in electric cars do not currently have a high enough energy density to be viable for long-distance haulage, meaning trucks such as Tesla’s planned Semi could require tonnes of batteries, denting their efficiency and raising their cost.

Graphic showing how electric roads could halve energy consumption

In contrast, a lorry fitted for electric roads would only require a battery of similar size to an existing Tesla car to be able to cover the vast majority of the UK, according to David Cebon, a professor of mechanical engineering at Cambridge University who co-authored the study.

Multiple lorrymakers are developing lorries running on hydrogen fuel cells, but the authors of the study argue that “green” hydrogen trucks would use three times more energy than an electric road system. This is because energy is lost at every conversion: using solar energy to make hydrogen and then a fuel cell to generate electricity again.

The electric road system would also have a major advantage over alternatives in that it would be possible to tax the electricity used by lorries, enabling the government to easily replace revenues lost from taxing diesel fuel, the report said.

[embedded content]

“If you have an inefficient energy system, you build fundamental inefficiencies into your economy, which puts the country at a competitive disadvantage,” said Cebon. “You create efficiencies [by using the ERS] that give you financial headroom. The government can generate tax revenues through this scheme because it is efficient.”

The report suggests that a first phase of building work on the busiest roads could take two years, costing GBP5.6bn. However, electrifying those most popular routes alone would cover almost a third of the miles travelled by heavy goods vehicles in the UK. Later stages would bring the total cost to GBP19.3bn.

Lower energy costs are predicted to pay back vehicle operators for the investment in new vehicles within 18 months, while electrification infrastructure could pay back its investors – either government or private – within 15 years, the report said.


Please enter your comment!
Please enter your name here

Enter Your Information Below To Receive Free Trading Ideas, Latest News, And Articles.

Please Enter Your Email Address:

Your information is secure and your privacy is protected. By opting in you agree to receive emails from us and our affiliates. Remember that you can opt-out any time, we hate spam too!


UK’s net zero pledge: what has been achieved one year on?

Last summer, Theresa May signed into law the UK's ground-breaking target of hitting net zero carbon emissions by 2050 against a backdrop of increasingly...

Record US virus cases reported as Q2 earnings season begins

Over the weekend the surge in Covid-19 cases in the US continued to escalate, with Florida setting a record for the most new cases...

Swim on sharks, nothing to see here: could fake kelp prevent attacks?

In 2017, surf champion Kelly Slater responded on Instagram to the death of Alexandre Naussac, a bodyboarder who died after a shark attack: "Honestly,...

Endangered sea turtles hatch on Brazil’s deserted beaches

Nearly 100 critically endangered sea turtles have hatched on a deserted beach in Brazil, their first steps going almost unnoticed because of coronavirus restrictions...

Global markets dip as US registers 30,000 new virus cases

Global stock markets were weaker overnight in Asia as concerns about the resurgent coronavirus continue to grow. Both the Nikkei and the Hong Kong Hang...