Why So Early? School Start Times and Suburban Sprawl

The advent of sprawl coincided with a move toward earlier school start times, prompted by a need to coordinate complicated bussing. If students could walk to school, the problem might disappear.

1 minute read

April 6, 2017, 5:00 AM PDT

By Philip Rojc @PhilipRojc


It's hard to believe as a younger person, but before mass suburbanization school used to start at 9 a.m. or later. That isn't the case today. Mimi Kirk writes, "according to the Centers for Disease Control and Prevention, at least 75 percent of schools surveyed in more than 40 states for a 2015 report started before 8:30 a.m., with a significant number starting in the 7 a.m. hour."

Why the change? Kirk traces it to the 1960s and 1970s, when sprawl began to make walking to school difficult. Cultural changes around childrearing also discouraged walking. The result, a tiered bus schedule, imposed early start times for high schoolers. As driving became the norm, so did an early start.

Kirk discusses how the 7:30 a.m. start may cut into young people's sleep needs. "That research, which recently led both the CDC and the American Academy of Pediatrics to urge later start times at American schools, shows that teenagers need at least nine hours of sleep a night."

A movement to push back school start times is picking up speed, but faces its share of debate. Long-term, a common sense solution to the problem would be to re-enable walks to school. But that would require walkable communities, and encouraging those can be an uphill climb both ways. 

Thursday, March 23, 2017 in CityLab

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

June 11, 2025 - Diana Ionescu

Metrorail train pulling into newly opened subterranean station in Washington, D.C. with crowd on platform taking photos.

Congressman Proposes Bill to Rename DC Metro “Trump Train”

The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).

June 2, 2025 - The Hill

Large crowd on street in San Francisco, California during Oktoberfest festival.

The Simple Legislative Tool Transforming Vacant Downtowns

In California, Michigan and Georgia, an easy win is bringing dollars — and delight — back to city centers.

June 2, 2025 - Robbie Silver

Street scene in Kathmandu, Nepal with yellow minibuses and other traffic.

The Small South Asian Republic Going all in on EVs

Thanks to one simple policy change less than five years ago, 65% of new cars in this Himalayan country are now electric.

1 hour ago - Fast Company

Bike lane in Washington D.C. protected by low concrete barriers.

DC Backpedals on Bike Lane Protection, Swaps Barriers for Paint

Citing aesthetic concerns, the city is removing the concrete barriers and flexposts that once separated Arizona Avenue cyclists from motor vehicles.

3 hours ago - The Washington Post

Bird's eye view of studio apartment design.

In These Cities, Most New Housing is Under 441 Square Feet

With loosened restrictions on “micro-housing,” tiny units now make up as much as 66% of newly constructed housing.

5 hours ago - Smart Cities Dive