What's the alternative? Stop building double-wide roads in areas where speed control is desirable. Start prioritizing humans over cars. Locally, they've put

What's the alternative? Stop building double-wide roads in areas where speed control is desirable. Start prioritizing humans over cars. Locally, they've put several such roads on "diets" with good success (usually cutting lane count in half, using the space for bike lanes). Accident rates are down, speeding is down, and throughput only marginally impacted. I guess we could develop roads that are actually sized for the speed you want people to travel... I'm told by every civil engineer in America that that's crazy talk for some reason. It's only crazy if rule #1 is maximizing auto throughput, which has historically been true in the US. And it's hard to do retroactively, because other transit options usually aren't sufficient (and cost a fortune to retrofit). But, designing such places from scratch shouldn't be too difficult.