The article is from May 2019 and the project itself was already open to use in July/August 2018. But they had to stop it again after a few weeks due to issues with the poles holding the electric wiring.
Also, as the article describes, there are a few electric highways in other countries such as Sweden and Norway as well.
I think the correct term is "electric trucking" as you are referring this to the future of trucks on roads and not locomotives which run on rails.
Anyway, the only reason to cause a shift away from Diesel powered engines is when electric powered trucks (no matter if battery or hydrogen) are getting cheaper in the short and long term operations. This is also the reason why you see newer trucks (and engines) coming to the market. Those trucks are simply more efficient than their predecessors and therefore better for your business.
While electric trucks can be cheaper due to lower maintenance and fuel costs, their upfront cost is too high and their maximum distance per charge is too low for National or even international long-distance trucking.
Also worth to note and to compare:
https://www.mercedes-benz.com/en/vehicles/trucks/eactros-heavy-duty-electric-truck/ (*couldn't find any other manufacturer link with an electric distribution or hevy class truck*)
The truck can be recharged in 2 to 11 hours. (20-150kw charging)
240kw total capacity. That is barely enough to drive 300 km with a 40-ton combination (truck 25t + trailer). And here you can already see where the problems are starting. Imaging also carrying another ton of additional weight just for the overhead "charging".
Electric highways can decrease the size of this issue, but there is still another issue left. The distance between the comapanies and the electric highway are too long (on average). You would need to either charge your truck while loading cargo or you would need to idle and wait for your truck to recharge.
As long as you are a forwarding/trucking company that is specialized in systematic transport (always driving from A to B and back) this ain't an issue, but as soon as you are always driving different routes to different companies, you're running into a few other problems. Where are you going to charge your truck if you don't have a highway in sight? What if all charging stations are already in use by other trucks charging? Or where are you going to charge your truck in the middle of this big forrest you have to deliver your cargo to?
What if you need to charge your truck for 10 hours until you can continue your driving, is it really worth it or are you losing time and therefore income?
As you can see there are too many issues left for most traansportation companies and therefore this is only a topic of importance to companies offering systematic transportation (read: forwadring companies)
Currently the trucks that use this electric highway are hybrids and therefore a compromise.
The time will show how this will develop, but I don't think that we will see any heavy electric trucks for serious use any time soon.