Hi, I’m Mojtaba.
I’m a traffic engineer focused on operations, safety, and data driven decision making. I write about transportation and engineering in the Professional section, and explore ideas and perspectives beyond engineering in the Personal section.
I also design and build practical web tools, especially for transportation analysis and technical workflows. Some began as solutions to problems I encountered in practice and have grown into tools others can use as well. You can explore them in the Studio.
Visit the About Me page to learn more about my background, interests, and work.
Latest Writing:
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When a Crosswalk Request Is About More Than a Crosswalk
A crosswalk request during a neighborhood traffic calming meeting raised a broader question: what problem are we actually trying to solve? The discussion highlighted the difference between pedestrian connectivity, traffic calming, perceived safety, and…
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History of Roundabouts, Part 5: How Roundabout Design Evolved
Roundabout design evolved beyond choosing a central-island size. Part 5 examines fastest-path speed checks, multilane path overlap, truck accommodation, rural speed transitions, and the shift toward performance-based geometry.
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History of Roundabouts, Part 4: Crossing the Atlantic
The modern roundabout reached the United States in 1990, but overcoming decades of skepticism required more than one installation. Early projects in Nevada, Maryland, and Colorado built an American evidence base, distinguished modern roundabouts…