Another city has joined in the fight against diesel cars. This time, Hamburg, Germany, plans to impose a ban on the fuel type as early as May 31.

The ban will not happen citywide, but along two major roads in the city center instead. To assist those affected by this, the city has placed a number of signs to warn drivers of the ban and suggest an alternate route.

It's not a blanket ban on diesel either. Only cars introduced prior to 2009 (when Euro 5 emissions standards were introduced) will be under the restriction. Some pushed for the inclusion of Euro 6 standards, which would have banned diesel vehicles built before 2014. The courts decided against the idea in the end.

The recent decision was due to growing concerns over local pollution, particularly after the still-fresh emissions scandal. Multiple German cities have been shown to exceed air pollution limits set by the European Union.

In the meantime, other European countries are making their own efforts. The United Kingdom, France, the Netherlands, and Norway all have proposed plans to ban vehicles powered by internal-combustion engines by 2040.