CISD meaning in Regional ?

Answer:

What is Colonel's Island Railroad mean?

In the late 1960s, the State of Georgia started an improvement project for the port at Brunswick, Georgia. In this project, the Colonel's Island Railroad (reporting mark CISD) was created as a part of the Georgia Ports Authority. The CISD operated 33 miles of track in and around the Brunswick area. In 1998, the railroad sold most of its assets and the Golden Isles Terminal Railroad began operating on the line. The Ports Authority retained ownership of the track, but the CISD was disbanded.

reference

Full Form	Category
Council of Information Services Directors	Business
Coppell Independent School District	Community
Conroe Independent School District	Community
Crowley Independent School District	Community
Correctional Institution Standardized Development	Community
Center for Interfaith Studies and Dialogue	Community
Carroll Independent School District	Community
Canutillo Independent School District	Community
Computational and Information Sciences Directorate	Computing
Configuration Interaction Singles & Doubles	General
Central Information Systems Division	General
Civilian Information Services Division	General
Canadian Industrial Security Directorate	Governmental
Communications Internet Systems Division	Internet
Critical Incident Stress Debriefing	Networking
Colonel's Island Railroad	Regional
Colonel's Island Railroad Company	Regional