👁️ Sight Distance Calculator

Calculate minimum stopping sight distance, passing sight distance, and intersection sight distance based on design speed and roadway conditions.

Based on AASHTO Green Book standards for highway design

Sight Distance Inputs

Positive for uphill, negative for downhill
AASHTA standard: 2.5 seconds
AASHTO standard: 3.4 m/s²
AASHTO standard: 1.07 m
Object height to be seen

Results

Enter parameters to calculate sight distance requirements.

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