We meet Walt Brinker, a former Houstonian who has made a hobby out of helping motorists stranded along the roadside — so much so that he wrote a book about it.

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We learn about Walt Brinker , a former Houstonian who’s made a hobby of stopping and helping other motorists with car problems.

He’s written a book about everything he’s learned over the years. It’s called Roadside Survival: Low-Tech Solutions to Automobile Breakdowns.

He says about 75 percent of the problems he’s encountered were tired-related issues.

Brinker now lives in North Carolina and spoke with Houston Matters producer Michael Hagerty.