Transportation agencies rely on a complex ecosystem of internal teams, contractors, and technology providers to maintain and operate critical infrastructure. From traffic signal systems and tolling platforms to intelligent transportation systems (ITS), remote access is essential to keeping operations running efficiently.
In highly connected and distributed environments, however, remote third-party access also introduces significant risk.
Why Remote Access Is Essential for Transportation Cybersecurity
Unlike centralized IT environments, transportation infrastructure is inherently distributed. Systems are deployed across roadways, intersections, control centers, and regional facilities, often spanning large geographic areas.
To support this distribution of resources, agencies depend on remote access for:
Maintaining and troubleshooting field devices
Managing system configurations and updates
Enabling vendor support for specialized platforms
Monitoring performance across regions
This access is critical for operational continuity, but it also expands the attack surface.
How an IT Approach to Remote Access Falls Short Within Transportation Environments
Many organizations still rely on traditional remote access methods, such as VPNs, to connect users to internal networks. While effective in IT environments, these models introduce significant challenges in OT and transportation systems.
Common limitations include:
Overly broad access, connecting users to entire networks rather than specific systems
Limited visibility into user activity once access is granted
Inconsistent enforcement of access controls across environments
In practice, this can enable users to exceed their intended permissions, increasing the risk of unauthorized access and lateral movement across critical systems.
Why Remote Access Tool Sprawl Is a Problem
As organizations scale, they often accumulate multiple remote access tools across IT and OT environments to meet vendor, contractor, and operational needs. This creates fragmented “tool sprawl” that is difficult to manage and secure.
Key challenges include:
Inconsistent security policies across different tools
Expanded attack surface from multiple access points and credentials
Reduced visibility due to fragmented logging and monitoring
Higher operational complexity for users and security teams
Increased risk of misconfiguration and audit gaps
Ultimately, tool sprawl undermines a unified access strategy, replacing centralized control with a patchwork of disconnected solutions and blind spots.
Remote Access Risks for Transportation Agencies
Remote access is a frequent pathway that enables cyber incidents, particularly when:
Credentials are compromised
Vendor access is not tightly controlled
Sessions are not actively monitored
In transportation environments, this risk is amplified by the interconnected nature of systems. An issue that begins with a single access point can extend into operational networks that support traffic flow, safety systems, or real-time decision-making.
How Transportation Agencies Can Secure Remote Access Without Disrupting Operations
To reduce risk while maintaining operational efficiency, agencies are adopting more structured and secure access models.
Key principles include:
Zero trust architecture and least-privilege access, continuously verifying identity, device posture, and context while limiting users to only the systems and resources required for their role
Session-based, granular access controls that restrict connections to approved timeframes, activities, and specific systems or applications rather than entire networks
Centralized policy management and continuous session monitoring to enforce security consistently, detect suspicious activity in real time, and terminate potentially malicious sessions before threats spread
Comprehensive session logging and auditing to support regulatory and compliance requirements across critical environments
This approach helps minimize unnecessary exposure while still supporting operational needs.
How Visibility Strengthens Secure Access in Transportation Environments
Controlling access is only part of the solution. Visibility into how access is granted and used is equally important.
Organizations need the ability to:
Monitor user activity during remote sessions
Identify unusual behavior or deviations from expected patterns
Maintain audit trails for compliance and investigation
Without these capabilities, it is difficult to detect misuse or respond effectively to potential threats.
How Secure Access Supports Always-On Transportation Operations
Transportation systems are designed to operate continuously. As a result, security measures must be implemented in a way that does not disrupt critical services.
Effective access solutions should:
Avoid introducing latency or instability
Support a wide range of legacy and modern systems
Be easy for both internal teams and vendors to use
Balancing security and usability is essential to ensuring adoption and long-term effectiveness.
How Secure Remote Access Fits Into a Broader OT Security Strategy
Secure remote access should not be treated as a standalone capability. It is most effective when integrated with broader network protection and monitoring efforts.
By combining access controls with:
Organizations can better understand and manage risk across the full lifecycle of an access session.
Securing the Future of Transportation Networks
Remote access is a foundational requirement for modern transportation operations. By shifting from broad, network-level access to more granular, visibility-driven models, agencies can reduce risk while maintaining the flexibility needed to support complex, distributed infrastructure.
Capabilities such as secure remote access, continuous session monitoring, centralized policy enforcement, and detailed audit logging help transportation organizations control vendor and third-party access without disrupting operations. Combined with broader network visibility, segmentation, and threat detection across IT and OT environments, agencies can better identify suspicious activity, contain potential threats earlier, and reduce opportunities for lateral movement across critical systems.
In an environment where uptime and safety are critical, secure access is an operational necessity.
Read the complete Secure Access Buyers guide to learn more.
