EVITP User Experience and Accessibility 3 — Questions and Answers
Question 1: What information must be displayed on signage at an EV-designated accessible parking space to comply with both ADA and local EV ordinances?
- Vehicle type restriction and accessible symbol only
- The international symbol of accessibility, EV-only restriction, and towing notice (Correct answer)
- Charging cost per kWh and maximum dwell time only
- Network provider logo and station ID number
Correct answer: The international symbol of accessibility, EV-only restriction, and towing notice
Compliant signage must show the ISA for accessibility, restrict the space to EVs, and include tow-away information to deter non-EV and non-accessible parking.
Question 2: At what minimum height should EV charging station signs be mounted to prevent obstruction by parked vehicles while remaining readable from a vehicle?
- 5 feet above the finished floor
- 7 feet above the finished floor (Correct answer)
- 4 feet above the finished floor
- 6 feet above the finished floor
Correct answer: 7 feet above the finished floor
Signs mounted at 7 feet AFF are visible above the rooflines of most parked vehicles while still readable from a seated driver's position.
Question 3: Which contrast ratio is recommended between text and background on EV charging station instruction labels to ensure readability for users with low vision?
- 3:1 minimum
- 4.5:1 minimum (Correct answer)
- 7:1 minimum
- 2:1 minimum
Correct answer: 4.5:1 minimum
WCAG 2.1 Level AA requires a 4.5:1 contrast ratio for normal-sized text, which also applies to physical signage best practices for low-vision users.
Question 4: A charging station displays only a QR code for starting a session. Why does this present a user experience accessibility barrier?
- QR codes are too slow for typical charging sessions
- Users without smartphones or with visual impairments cannot initiate charging (Correct answer)
- QR codes are not secure for payment processing
- Network providers do not support QR authentication
Correct answer: Users without smartphones or with visual impairments cannot initiate charging
Sole reliance on QR codes excludes users who lack smartphones, have visual impairments, or have motor difficulties that prevent camera use.
Question 5: What does ISO 15118's Plug & Charge (PnC) feature primarily improve from a user experience standpoint?
- It increases charging speed by 30%
- It eliminates the need for cards or apps by authenticating via the cable connection (Correct answer)
- It enables wireless charging without a physical plug
- It standardizes connector shapes across all networks
Correct answer: It eliminates the need for cards or apps by authenticating via the cable connection
Plug & Charge (ISO 15118) allows the vehicle to automatically authenticate and authorize payment when connected, removing manual steps for users.
Question 6: For an EVSE touchscreen display, which font size is considered the minimum for body text to support users with low vision without requiring additional magnification aids?
- 8 point
- 14 point (Correct answer)
- 10 point
- 12 point
Correct answer: 14 point
A minimum of 14-point font is widely recommended for outdoor kiosk displays to remain legible for users with mild to moderate low vision.
Question 7: Which wayfinding strategy best helps EV drivers locate available charging stations within a large parking structure?
- Publishing station locations in the facility's printed map only
- Dynamic overhead signs showing live availability status by zone (Correct answer)
- Painting arrows on the floor at each ramp
- Placing a static sign at the facility entrance only
Correct answer: Dynamic overhead signs showing live availability status by zone
Dynamic overhead signs with live availability data reduce driver frustration and circulation time, directly improving the EV charging user experience.
EVITP User Experience and Accessibility 3
What information must be displayed on signage at an EV-designated accessible parking space to comply with both ADA and local EV ordinances?