Countries are trying different ways to reduce carbon emissions from vehicles on motorways. A few years ago, the Dutch introduced a system where the general motorway speed limit was 100 km/h, but the from 7pm to 6am), the limit increased to 120 km/h or in some places 130 km/h. It was as much an attempt to reduce carbon emissions as it was to encourage people to make their journey when the motorway was less crowded.
But a recent article in Spanish site, https://forococheselectricos.com/, pointed to a much more sensible – and simple – approach being taken by Austria, where, on certain sections of motorway, the speed limit is reduced to 100 km/h, where the normal limit is 130 km/h, but electric cars are exempt from this limit and can continue travelling up to the general speed limit for the road. And on occasions when the 100 km/h limit is reduced to 80 km/h for air quality reasons, electric cars can still travel at the 100 km/h limit.
Interestingly, this exception does not apply to hybrids, as the regulations distinguish between an electric car and a vehicle that also has a combustion engine.
Read the article (in Spanish), on https://forococheselectricos.com/, here.