№ files_lp_4_process_1_25110
Guideline for engineers and planners detailing standards for resurfacing, restoring, and rehabilitating rural roads, including lane widths, curvature, superelevation, clearances, bridge criteria, and guardrail requirements.
Year: 2026
Region: United States
Topic: Rural road design standards
Document type: Technical guideline
Organization: State Department of Transportation
Target audience: Civil engineers, transportation planners
Design traffic (ADT): <400, 400-1700, >1700 vehicles/day
Anticipated posted speed: 55 mph
Lane width: 10–11 ft
Combined lane and shoulder width: 12–17 ft
Maximum horizontal curvature: 10–12.25 degrees
Vertical alignment: Existing grades and sags specified
Superelevation: 0.08 ft./ft. maximum
Clearances: Horizontal 10–14 ft, vertical 14 ft
Bridge requirements: Legal loads without posting, minimum width based on ADT
Guardrail standards: According to EPG 606.1
Culvert and fill slope guidance: Existing conditions unless safety analysis requires modifications
Exceptions: Allowed for curves, bridge railings, and design features based on traffic and safety analysis
Price: 8 / 10 USD
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