The company requires the drivers to keep to schedule.

公司要求司机正点行车。

youdao

The heavily laden infantry, though enjoying a superiority of six-to-one, simply could not keep to schedule and lost 60,000 men in one day.

这支负载很重的步兵，尽管享有六比一的优势，完全不能遵守时间表，并且在一天内损失六万人。

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youdao

Across town, if the architects and couple Massimiliano and Doriana Fuksas keep to schedule, their Nuvola -- a glass conference centre that was designed to recall a floating cloud -- will open in 2013.

BBC: Rome��s new architectural renaissance

These types of apps are sometimes compared to personal assistants, someone working in the background to keep your schedule in check and make sure you have the information needed to coast through a busy day.

CNN: Google's predictive search comes to iPhone, iPad

After all I need to keep my schedule clear.

FORBES: Paying Turkers To Steal Readers, Write My Articles, Do My Reporting, And Fix My Liver