ERP X

Mobile app design, system design, user research

ERP X was an exploration into the future of road payments and traffic regulation. No cash-card devices, no gantries, and a better user experience.

I led the project as the sole designer, working with 3 software engineers, 1 policy strategist, and 1 product manager. In just 1.5 months, we completed research, user testing, UI design, core app development, and launched an official pilot with 100 drivers—partnering with the Ministry of Transport and Land Transport Authority.

A collection of six mobile phone screens displaying a financial management app interface. The screens show various features including transaction summaries, vehicle information, a map of a delivery route, payment alerts, and registration for license plate tracking.
A busy multi-lane road with cars, motorcycles, and trucks, with some vehicles detected and highlighted with blue boxes and license plates, along with green traffic lights and trees on the sides.

No gantries, no cash cards

  1. Traffic cameras use ANPR (Automated Number Plate Recognition) to scan vehicle plates, eliminating the need for toll gantries or in-vehicle hardware.

  2. Link your credit card in the app. Set it up once, and you’re good to go.

  3. Your linked credit card is billed automatically, with instant app notifications in under 3 seconds.

  4. Clear breakdowns of what you’ve spent—by day and by month.

The process

Research objectives

  1. Influence driver behaviour and deter entry into congestion zones

  2. Simplify user authentication for a seamless onboarding experience

  3. Ensure privacy and security in car-sharing scenarios

  4. Validate accuracy and speed of notifications and road charge processing

  5. Identify additional features to prioritise for future development

KPIs & metrics achieved

  1. User satisfaction (9.6 out of 10)

  2. Registration and set up (30s ~ 1 min)

  3. Plate detection accuracy (97 ~ 99%, all weather conditions)

  4. Notification timeliness (1 ~ 5s after passing a camera)

  5. Preferred using the new system (100% yes)

Early UI diagram

I built the first version of the live prototype in Flutterflow, in 3 days from when we first started the project. Tested the fields and typing interactions with elderly drivers. Sat in 10 cars. Then iteratively created improved versions on Figma.

Flow diagram of an ERP X smart vehicle management app showing onboarding, vehicle addition, editing, and reporting features with annotated instructions.

Feature map

I plotted our user feedback across an end-to-end user journey, to create a feature map. This helped us see what had been solved, and what still needed attention. I used it to plan and prioritise incremental design improvements throughout the 1.5 months.

Green = doing well, users love this

Red = not doing well, gaps to fix

Yellow = in progress

Flowchart illustrating the driver’s journey, in-app features, and carplay features for a vehicle management app, including steps for downloading the app, setting up the account, routing, in-car features, and vehicle entry.

Final UI and colour palette

Collection of mobile app screens demonstrating car parking payment and management process, including user registration, vehicle addition, payment options, and transaction summaries.
Color palette chart titled 'ERP X palette' showing primary, grey, and supporting color categories with color swatches, color codes, accessibility, and reference codes.