vehicle-ddr · open source

Drive Direction Recognition — Interactive Demo

Select a scenario · observe sensor fusion · explore the 8 edge cases

github.com/venaychawda/ddr-algorithm
Venay Chawda · Function Owner DDR @ Bosch

Select a driving scenario

Choose any scenario from the left panel — normal driving, edge cases, or sensor faults.

← pick one from the list

›

Click Animate to play back

Watch sensor signals update in real time as the algorithm processes each 10ms cycle.

▶ Animate button — Direction timeline panel

›

Explore the outputs

Observe DDR direction, confidence score, diagnostic flags, and the ISO 26262 safety note below.

try all 8 edge cases

Driving scenarios

Processing pipeline

L1 · Signal Processor › L2 · Plausibility › L3 · State Machine › L4 · Confidence › L5 · Diagnostics

DDR output

Direction

—

Confidence

—

Time in state

—

0%—100%

Sensor inputs (live during playback)

Wheel speed FL

—

Wheel speed FR

—

Wheel speed RL

—

Wheel speed RR

—

Long. acceleration

—

Brake pressure

—

Gear position

—

Cycle time (sim)

10 ms

Direction timeline

Forward

Reverse

Standstill

Unknown / Transition

Confidence %

Diagnostic word (8-bit)

gear_mismatch [bit 0] wheel_fault [bit 1] low_speed_mode [bit 2] transition_active [bit 3] confidence_degraded [bit 4] plausibility_conflict [bit 5]

          CAN byte: 0x00
           · 
          binary: 0000 0000
        

Algorithm challenge

Select a scenario to see the key algorithmic challenge and how DDR handles it.

ISO 26262 relevance

Select a scenario to see the safety implication for downstream systems (ESP, HSA, Park Assist).