“Caeley worked with us over the course of a quarter on a user-centered project focused on parking and rewards. She was thoughtful, proactive, and a great collaborator with my team throughout.
We enjoyed working with her, she delivered a clear, well-researched final presentation and brought strong design thinking to the work.”

Helene Sears, Head of User Experience at Lime

~ Project Sponsor

Sponsored By Lime

A Reward Experience to Promote Proper Parking While Reducing Lime’s Operational Overhead

Project Impact

  • Expanded Capture AI capabilities by designing a scalable training plan to recognize correct parking behavior.

  • Tested with over 30 riders across, 3 design sprints and delivering 10+ refinements to flows, behavior logic, and UI.

  • Quantified business impact, showing that small rider incentives ($3.50) could yield up to $45 in financial return.

  • Lime is moving forward with a rewards system that closely aligns with our proposed solution.

My Role

  • Reduced rider misuse and improved education by designing low-friction popups that fit naturally into the ride flow.

  • Identified a cost-saving opportunity by aligning user behavior with Lime’s operational goals.

  • Proposed the parking scenario workshop to simulate real-world rider behavior and inform design decisions.

  • Networked to turn our student project into a corporate sponsorship.

Team

  • 3 Graduate UX Designers

  • Lime Senior Product Manager

  • Lime Industrial Designer

  • Lime Experience Design Manager

Timeline

6 Months

Tools

Figma, Otter Ai

Agile
B2C
B2G
Navigation

Research and Scoping

A Gap in Curbside Parking for Riders and Cities

Our research revealed, pedestrians and cities are frustrated by poorly parked vehicles, riders feel unrecognized for responsible behavior, and Lime faces mounting operational costs and fines.

“I've sort of realized that no one's looking at these images, and no one's ever gonna get me in trouble, most of the times now I'll walk into class first before taking the photo.”


*Note: This user has never received a fine.

Participant 5

~ User Testing

“[Penalizing users for incorrect parking] isn’t how we want to make money”

Lime Software Engineer

~ Subject Matter Expert

Key Findings

27 Man-on-the Street and 5 Semi Structured Interviews

Users are Improvising

Users aren't Motivated

Users are in a Rush

Users improvise due to lack of parking infrastructure

Lime’s photo system isn’t motivating proper parking

Solutions must work within
real-world constraints

Ideation

Re-thinking the Parking Experience

Photos From Ideation Session

Experience Journey Map

Down Selection Criteria

  • Encourage tidy and compliant parking in free-floating markets.

  • Experience should be simple, low-effort, and fast.

  • Riders should feel confident about where and how to park.

  • Create a satisfying ‘peak-end’ moment.

  • Majority of users don’t use phones while actively riding.

Concept Testing

Exploring User Reactions to a Parking Rewards Prototype

Photos From Refined Review Session

Improvement Areas

  • Further refinement of the points to minutes reward ratio was needed. The system needing to feel achevible and motivate users to participate.

  • The location of onboarding/education needed to be changed.

Final Design

A photo review system that rewards users for
good parking

Feasibility

Lime will save on operational costs by implementing our system.

Current Costs

113% Growth

$6,400+ yearly

$240,000+ yearly

Lime since 2024 has been growing at an increasing rate.

In city fines for missparked scooters.

Annual cost of scooter relocation and rebalancing.

Savings

Moving Forward

We can have clutter free sidewalks once again!

Reflection

This project has been one of the most rewarding projects while in the MHCI+D program, and I’m incredibly grateful to both my fellow graduate team and Lime for supporting it. I’m proud that I took the initiative to turn a class project into a real-world collaboration, and even prouder of what we built together.