Best Headway · Tools
Safe Braking Distance Calculator
Typical safe braking model per IEEE Std 1474.1-2004, Annex D (phases A–E)
Inputs
Calculate SBD
Reset to defaults
Save template
Load parameters
Save parameters
Template: the default values with a description and unit for each field. Parameters: the values currently on the page. Files are JSON and include the traction curve.
Safe braking distance
–
m
Speed–distance profile
A+B
C
D
E
Position uncertainty / rollback
Hover the chart to read speed and distance. Click a phase on the curve, on the ruler or in the cards above to open its calculation.
Calculation details
Parameters