| Type | SDO | Title | Doc ID |
|---|
| Standard Profile | Profile | NTCIP using DATEX | NTCIP-DATEX |
| Message/Data | Consortium of AASHTO, ITE, and NEMA | Object Definitions for Signal Control and Prioritization (SCP) | NTCIP 1211 |
| American Public Transportation Association | Standard for Transit Communications Interface Profiles | APTA TCIP-S-001 3.0.4 |
| Communications Protocol | Consortium of AASHTO, ITE, and NEMA | Point-to-Point Protocol Over RS-232 Subnetwork Profile | NTCIP 2103 |
| Consortium of AASHTO, ITE, and NEMA | Transportation Transport Profile | NTCIP 2201 |