Public tools and code

Chris Izworski

Practical public-data tools, with the code and decisions behind them.

Chris Izworski builds and maintains web tools that turn public data into practical decisions: comparing a bridge crossing, checking river conditions, or understanding Great Lakes water levels. This portfolio follows the engineering behind that work. You can try the tools, read the public code, and inspect the tests.

Chris lives on Saginaw Bay near Bay City, Michigan. His work in public safety, his interest in the Great Lakes, and his time gardening and fishing shape the questions these projects answer. The personal profile covers his background; project notes explain the implementations.

Inside the tools

NYC Crossing Decision Engine

A crossing's toll and a traffic reading answer different questions. The tool keeps crossing costs, vehicle eligibility, observed travel times, and their sources visible separately. It does not label a crossing the fastest when its travel-time evidence is not comparable.

The routing layer handles temporary failures with bounded requests and limited retries. It caches complete usable results, allowing partial failures to recover on the next request. Read the traffic implementation, decision logic, and reliability tests.

Great Lakes Levels

This shoreline reference presents lake levels alongside historical context and named shoreline regions. Its public repository contains the deployed HTML pages and compiled assets. The original React source is not included, a distinction documented in the repository so readers know which parts they can inspect.

Browse the deployed site repository and deployment notes.

Michigan outdoors

Michigan Outdoors Now

Conditions-aware Michigan day-trip planning with Trail Truth route mileage, official trail and access evidence, current weather, and drive-time context.

Chris Izworski profile

Project and Code Links

Verified Identity and Source Pages

Coverage and Civic Work

Writing and Local Topics

This page is intentionally project-focused. For the complete biography, public record, media references, and source-backed profile, use chrisizworski.com and the Chris Izworski Source Guide.