Road Safety & Maintenance
Greenfield County is committed to maintaining a safe and reliable road network for all users. Our Public Works Department oversees the construction, maintenance, and inspection of over 1,240 kilometres of roads, 47 bridges, and more than 18,500 traffic signs across the County.
Our road maintenance program includes regular pavement rehabilitation, winter maintenance operations, and a comprehensive sign management program that ensures all traffic control devices meet provincial and federal standards for visibility and condition.
AI-Powered Sign Inspection Program
In 2026, Greenfield County launched an innovative partnership to conduct automated traffic sign assessments using computer vision and artificial intelligence technology. This program evaluates both the retroreflectivity and readability of every traffic sign in the County's inventory — a first-of-its-kind approach that goes beyond traditional inspection methods.
The automated assessment process uses a proprietary on-demand fleet to capture high-resolution nighttime imagery of every sign on every road, ensuring complete network-wide coverage. The AI-powered analysis identifies signs that may be approaching or below minimum compliance thresholds, helping the County proactively replace signs before they become safety hazards.
Key advantages of the program:
- 100% network coverage — every sign on every road is assessed
- Dual assessment: retroreflectivity and readability measured simultaneously
- Comprehensive baseline digital inventory with GPS coordinates
- No staff required on-road at night, improving worker safety
- Audit-ready, georeferenced compliance reports
- Data exports compatible with County GIS and asset management systems
Traffic Sign Management
Traffic signs are critical safety infrastructure that guide, warn, and regulate road users. Greenfield County maintains a digital inventory of all traffic signs, including regulatory signs (stop, yield, speed limits), warning signs, and guide signs.
Our sign management program complies with the Ontario Traffic Manual (OTM) and the Manual on Uniform Traffic Control Devices (MUTCD) standards for retroreflectivity. Retroreflectivity is the property that allows traffic signs to reflect a driver's headlights back to their eyes, making signs visible and legible at night.
Retroreflectivity Standards
The Province of Ontario established minimum retroreflectivity standards in 2010, requiring municipalities to implement a sign assessment and management method to ensure all traffic signs remain visible and effective for nighttime driving conditions. Greenfield County utilizes a combination of assessment methods approved by the FHWA, including our innovative AI-powered visual inspection and retroreflectivity measurement program.
| Sign Type | Minimum Retroreflectivity | Assessment Frequency |
|---|---|---|
| Regulatory (Stop, Yield, Speed) | 50 cd/lux/m² | Every 2 years |
| Warning Signs | 50 cd/lux/m² | Every 2 years |
| Street Name Signs | 15 cd/lux/m² | Every 3 years |
| Guide & Information Signs | 25 cd/lux/m² | Every 3 years |
Road Construction & Projects
The County's 10-year capital plan includes $380 million in road and bridge infrastructure investments. Current and upcoming projects include:
- County Road 7 rehabilitation — Phases 1 & 2 (2026–2027)
- Bridge #14 replacement over Greenfield Creek (2026)
- County Road 22 widening and intersection improvements (2027)
- Annual pavement preservation program — 85 km of resurfacing planned for 2026
- New multi-use trail along County Road 3 (2026–2028)
Report a Problem
If you notice a road hazard, damaged traffic sign, pothole, or other infrastructure concern, please report it through our Service Greenfield portal or call our Public Works Department at (905) 555-0100 ext. 2300.
Winter Maintenance
Greenfield County's winter maintenance program runs from November 1 to April 15. Our fleet of 28 snow plows operates 24/7 during winter events. Priority 1 roads (arterials) are cleared within 4 hours, followed by Priority 2 (collector roads) and Priority 3 (local roads). For real-time plow tracking, visit the Winter Operations page.