Signs & Markings
Delineator Spacing Calculator
Determine the optimal spacing (S) for delineators on horizontal curves based on the curve radius (R) using MUTCD guidelines.
Curve Parameters
ft
50 ft (Sharp)
1500 ft (Gentle)
MUTCD 3G.04 Info:
Delineators help drivers on curvy roads or where lanes merge. They are especially effective at night and in adverse weather when the roadway is wet or snow-covered.Curve Visualization
Target Spacing:
Required Spacing (S)
ft
S = 3 × √(R - 50)
Raw Calculation: ft
Rounding Rule: Values are rounded to the nearest 5 ft.
Limits: Min 20 ft, Max 300 ft.
Limits: Min 20 ft, Max 300 ft.