Speed Limits

I understand how to set speed limits, how about setting them for freight vs passenger?
Is that possible?
Not sure I am 100% clear on Primary Speed Limit and Secondary Speed Limit.
How does the Sim know the difference between freight and passenger trains?
Thanks!
Is that possible?
Not sure I am 100% clear on Primary Speed Limit and Secondary Speed Limit.
How does the Sim know the difference between freight and passenger trains?
Thanks!