Ball bank
Curve banking evaluation and superelevation review.
Services
Ball Bank
Ball bank studies evaluate whether roadway superelevation on curves is adequate for the intended design speed. This method helps confirm that vehicles can navigate bends safely without elevated skidding or rollover risk from lateral force.
Service objective
Determine whether roadway banking is appropriate for operating conditions and intended design speed.
Tooling stack
Ball bank indicator (tilt indicator)
Instrumented study vehicle
Curve segment log sheets
Design-standard comparison references
Process sequence
Step 01
Equipment setup
Mount and calibrate the ball bank indicator inside the study vehicle before field runs.
Step 02
Controlled curve runs
Drive target curves at design-relevant speeds while recording tilt behavior.
Step 03
Tilt data interpretation
Compare recorded tilt response to accepted design guidance for superelevation adequacy.
Step 04
Adjustment recommendations
Flag curves requiring potential banking adjustments to improve stability and safety.
Captured data and outputs
Captured data
- Tilt angle response by curve segment
- Speed context for each run
- Curve geometry behavior notes
- Comparative safety threshold indicators
Analysis outputs
- Superelevation adequacy assessment
- Curve safety interpretation by design speed
- Prioritized adjustment recommendations
- Technical summary for road design review
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