Telegraph Road Corridor

RDV Systems used RSA 3D to run a comprehensive roadway safety analysis along Telegraph Road in Stafford County, Virginia. Using LiDAR, high-resolution imagery and automated analytics, the study evaluated stopping sight distance (SSD), passing sight distance (PSD), intersection sight distance (ISD), horizontal curve geometry, safe speeds and roadside clear-zone conditions. The analysis identified potential sight-distance, geometric and roadside hazards to support targeted engineering review and proactive safety improvements.

Telegraph Road has multiple horizontal curves, varied roadside development and a mix of residential and commercial frontage, which raise concerns about run-off-road crashes, limited sight distance and roadside hazards. Traditional assessments can require extensive field work, which takes time and exposes workers to traffic.

Using mobile LiDAR and high-resolution imagery, RSA 3D automated multiple roadway-safety analyses across the Telegraph Road corridor. It also classified roadside objects, including vegetation, utility poles, signs, buildings, fences and mailboxes, and correlated them with the roadway geometry to identify potential safety deficiencies.

• Roadside obstacles. Multiple objects were identified within the recoverable clear zone.
• Vegetation. Vegetation obstructed roadway signs and reduced driver visibility.
• Sight distance. Horizontal curve segments showed constrained sight distance.
• Speed. Geometric conditions were identified where the available stopping sight distance warranted a speed review.
• Fixed objects. Fixed-object densities were higher within curved and developed roadway segments.
• Engineering value. The findings help focus engineering review and prioritize mitigation such as vegetation clearing, object relocation, speed review or roadway improvements.

By combining multiple roadway-safety analyses within a single digital environment, RSA 3D gave engineers a consistent, corridor-wide view of potential safety concerns. The findings can focus engineering review and prioritize mitigation such as vegetation clearing, object relocation, speed review or roadway improvements.

• Automated corridor-wide safety analytics
• Reduced field exposure and improved worker safety
• Consistent high-resolution roadway measurements
• Faster identification of critical safety concerns
• Scalable deployment across statewide roadway networks
• Delivered GIS-ready shapefiles and engineering reports

The Telegraph Road project shows RSA 3D evaluating multiple roadway-safety conditions across an entire corridor, from sight distance and horizontal curves to speed and roadside hazards. By combining LiDAR, imagery, automated analytics and engineering-ready outputs, RSA 3D gives a repeatable way to identify potential safety concerns and prioritize further engineering review.