User Experience and Accessibility Flashcards

What information must be displayed on signage at an EV-designated accessible parking space to comply with both ADA and local EV ordinances?

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.

At what minimum height should EV charging station signs be mounted to prevent obstruction by parked vehicles while remaining readable from a vehicle?

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.

Which contrast ratio is recommended between text and background on EV charging station instruction labels to ensure readability for users with low vision?

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.

A charging station displays only a QR code for starting a session. Why does this present a user experience accessibility barrier?

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.

What does ISO 15118's Plug & Charge (PnC) feature primarily improve from a user experience standpoint?

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.

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?

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.

Which wayfinding strategy best helps EV drivers locate available charging stations within a large parking structure?

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.