Line is displayed in Blue writing - why?

[Severous]

Hello

A few times I've seen the line name displayed in blue writing.  See screen shot.



The route is usually efficient but doesn't have to be perfect.  Am I gaining any bonus when a 'blue route' is achieved?

What is its purpose?

[Frank]

a vehicle from this line is old ( obsolete too )

[Severous]

Ah yes.  That explanation fits.

An old obsolete passenger coach from the Alder set.  Its the most efficient coach when passenger numbers are low. ive got it on two lines at the moment.

Thanks again Frank for your help.