What do these mean?

[Guest]

On the Air Traffic Control system Command Center web site for Preferred routes. It ask for Route Type. The types are L,H,LSD,HSD,SLD,HLD,TEC.What do all those mean?Bob Johnson Sr. (KMIE)

[BobK 0]

All I know is that "H" is for HIGH altitude rotues, and "L" is for LOW altitude routes. That should be all you need.

[Guest]

Thank you.Bob Johnson Sr. (KMIE)

[ErnieAlston 33]

L LOW ALTITUDE H HIGH ALTITUDE LSD LOW ALT SINGLE DIR HSD HIGH ALT SINGLE DIR SLD SPECIAL LOW ALT DIRECTIONAL SHD SPECIAL HIGH ALT DIRECTIONAL TEC TOWER ENROUTE CONTROL Regards.Ernie.

[Guest cj_flys_wmu]

Hey Ernie,I have looked all over the FAA's website in the AIM and ATC contractions list and I could only find TEC. Is there a location where there is information about these different routes that you know of? I would be interested in finding out more. Take care,C.J. StarrPPL, Instrument Student