Adaptive Van Operation & Accessibility: Detailed Walk-Through

Equipment Overview

• Wheelchair-mounted controls

  • Remote door opener velcroed beneath the armrest.

  • All other remotes (door, ramp, remote-start fob) are velcro-mounted to avoid dropping or forgetting them.

  • Seat belt permanently buckled and draped across the wheelchair for quick entry.

• Van modifications

  • Automatic side door and lowering suspension; door opens and van “kneels” so ramp has a shallow incline.

  • Driver’s seat removed—wheelchair rolls directly to driver position.

  • Easy-Lock docking system in the floor:

  • Wheelchair rolls over a mechanical pin; an audible click signifies lock-in.

  • Unlocking requires pressing a two-step release button on the screen plus manual switch.

• Primary driving hardware

  • Tri-Pin Steering Cuff (left hand)

  • Three vertical posts prevent hand from slipping out.

  • Electronic Gas/Brake Lever (right hand)

  • Push forward → brake.

  • Pull backward → accelerate.

  • Integrated safety beeper forces user to test both motions before gear shift.

  • Two grey control boxes (one near steering column, one on floor) manage all drive-by-wire signals; combined cost $\$40{,}000$.

Exiting the House & Entering the Van

• Press wheelchair-mounted door button → door slides open.

• Have roughly $10\,\text{seconds}$ to roll out before door auto-closes.

• Press ramp button on fob →

  • Ramp deploys.

  • Van lowers to reduce ramp angle.

• Roll into van, align with Easy-Lock, listen for locking click.

Starting & Preparing to Drive

• Commonly remote-starts van so cabin is pre-heated/cooled.

• Once docked:

  1. Insert key into ignition.

  2. Unhook seat belt from steering column and secure across torso.

  3. Tri-Pin cuff: slide left hand in.

  4. Right hand rests on electronic gas/brake lever.

  5. Safety beeper prompts gas/brake test; beeping ceases after successful test.

  6. Pull gear-selector lever down while pressing brake to shift out of Park.

Steering & Vehicle Control

• All steering handled by right hand on steering wheel.

• Back-up camera activates automatically in Reverse.

• Extensive practice enables confident maneuvering—even in heavy urban traffic (Downtown Minneapolis, Chicago).

The Digitone Secondary-Control System

• Operated by tilting left wrist left/right inside tri-pin; system converts tilt + dwell time into audible "beeps" that map to functions:

  • $1$ beep → Left blinker.

  • $2$ beeps → Right blinker.

  • $3$ beeps → Windshield wipers ON.

  • To turn OFF, perform $3$ beeps twice (two speeds).

  • $4$ beeps → Cruise-control set (requires highway speed).

  • $5$ beeps → High-beam headlights.

  • $6$ beeps → Horn (must hold wrist; delay makes horn rarely used).

Communication & Infotainment

• Blue elbow-level buttons on dash:

  • Upper blue: answer incoming phone via built-in hands-free mic/speakers.

  • Lower blue: activates voice-command interface.

  • Verbal commands: "Turn audio on," "Play CD," etc.

  • Internal storage: $16\,\text{GB}$ (~$1{,}500$ songs) for onboard music library.

• Voice control critical—taking hands off steering or gas/brake could cause loss of control.

Driving Experience & Personal Reflections

• Drives daily on rural roads and congested city routes; independence and control are highly valued.

• Humor: “I’m a woman and I like to be in control.”

• Recognizes wide range of adaptive driving systems; hers is among the most complex (full electronic drive-by-wire) and expensive.

• Technology viewed as priceless investment in autonomy despite high monetary cost.

Returning Home & Exiting the Van

1. Park vehicle.

2. Hook seat belt back onto steering column so it’s elevated for next entry.

3. Turn ignition off; remove key.

4. Release Easy-Lock:

   • On dash touchscreen press unlock icon.

   • Press physical switch; audible sound confirms disengagement.

5. Shut down electronic drive system:

   • Tap “bubble” icon twice on touchscreen.

6. Deploy ramp via same wheelchair-mounted button used earlier.

7. Roll out; door auto-closes behind.

Key Takeaways / Significance

• Demonstrates integration of mechanical, electronic, and software systems to create full, single-user independence for drivers with limited limb function.

• Shows the layered safety mechanisms: timed doors, audible feedback, mandatory gas/brake test, camera assists, lock confirmations.

• Highlights financial and technological barriers—$\$40{,}000$ equipment cost—yet underscores intangible value of freedom.

• Provides real-world illustration of universal design, assistive technology, and the societal importance of accessible transportation.

The van has several features that allow her to drive into it:

• Automatic Side Door and Lowering Suspension: The side door opens automatically, and the van 'kneels' or lowers its suspension, creating a shallow incline for the ramp.

• Ramp Deployment: A ramp button on a fob deploys the ramp.

• Easy-Lock Docking System: Once inside, the wheelchair rolls over a mechanical pin in the floor, and an audible 'click' confirms it is securely locked in place.

The seat belt is permanently buckled and draped across the wheelchair for quick entry. When she is ready to drive, she unhooks it from the steering column and secures it across her torso. Conversely, when returning home, she hooks the seat belt back onto the steering column so it is elevated for the next entry.

She uses an Electronic Gas/Brake Lever with her right hand. To brake, she pushes the lever forward. To accelerate, she pulls it backward.

She shifts gears by pulling the gear-selector lever down while pressing the brake to shift out of Park. All steering is handled by her right hand on the steering wheel. Her left wrist, positioned within the Tri-Pin Steering Cuff, controls secondary functions through the Digitone Secondary-Control System:

• She activates the left blinker with $1$ beep.

• She activates the right blinker with $2$ beeps.

• She turns the windshield wipers ON with $3$ beeps, and to turn them OFF, she performs $3$ beeps twice for two speeds. The note does not specifically mention window washing fluid, but the windshield wipers are controlled this way.

To answer the phone, she presses the upper blue elbow-level button on the dash, which connects incoming calls via built-in hands-free microphone and speakers. To adjust the radio or other audio functions, she uses verbal commands activated by pressing the lower blue elbow-level button, such as "Turn audio on" or "Play CD." Voice control is critical as taking hands off the steering or gas/brake could cause loss of control.

The wheelchair is secured by an Easy-Lock docking system in the floor of the van. The wheelchair rolls over a mechanical pin, and an audible "click" confirms it is securely locked in place, preventing it from moving while the car is in motion or during an unexpected event.

Tasha exits her house by pressing a wheelchair-mounted door button, which slides the door open. She then has approximately $10\,\text{seconds}$ to roll out before the door automatically closes.