511 Traveler Information & Advanced Traffic Management System
Tier 0 — Mission CriticalOperates the statewide Traffic Management Center: CCTV, dynamic message signs, incident response dispatch, and the public 511 phone/web/app traveler information service. Primary tool for lane-reversal execution during hurricane evacuation.
- Business Owner
- J. Whitfield — Director of Traffic Engineering
- Traffic Engineering
- Technical Owner
- R. Caldwell — ITS Operations Manager
- Hosting
- On-Premises
- Statewide TMC (Columbia) with vendor-hosted 511 front end; field device network on SCDOT fiber
- Platform / Vendor
- Commercial ATMS suite + vendor-hosted 511 web/IVR
- Data Classification
- Internal
- User Base
- TMC operators (24×7), district traffic offices, 1.2M+ annual 511 public sessions
Business Impact Assessment
Scored 1 (negligible) to 5 (severe) across the six impact categories from the Phase I BIA scope.
Loss of incident detection and DMS warnings creates immediate roadway hazard exposure; evacuation lane-reversal depends on ATMS.
TMC operations halt statewide; no fallback console for field device control.
511 is the primary public channel for road conditions during weather events.
Aging field network segments; single fiber ring section between TMC and District 1 hub; vendor 511 front end has had two multi-hour outages in 24 months.
Recovery Objectives
Documented pre-BIA- Minimum availability
- 99.95%
- Service window
- 24×7×365
Workaround Feasibility
Manual signal timing plans and Highway Patrol radio dispatch sustain limited operations for ~2 hours; no workaround for DMS or 511 public messaging.
Dependencies
Systems, vendors, data feeds, infrastructure, and personnel this application depends on. Single points of failure are flagged.
| Dependency | Type | SPOF | Notes |
|---|---|---|---|
| SC Highway Patrol CAD feed | Data Feed | SPOF | Single interface; no secondary incident source |
| ATMS field device network (fiber ring) | Infrastructure | SPOF | One unprotected ring segment TMC ↔ District 1 |
| OneMap Enterprise GIS | System | — | Map tiles and LRS location referencing |
| RWIS weather station network | Data Feed | — | — |
| 511 IVR/web vendor | Vendor | — | Vendor-hosted; SLA 99.9% |
Tier Assignment Traceability
Public safety score of 5 (R1): incident detection, evacuation lane-reversal, and public warning functions have direct life-safety impact within minutes of an outage.