The incident raised questions about the safety of systems that can perform driving tasks for extended stretches of time with little or no human intervention, but which can not completely replace human drivers. (fortune.com)
They're often associated with long plane rides, when you're seated for extended stretches of time. (health.com)
The world rankings demonstrate excellence over extended stretches but it's close to impossible to predict the actual winners in a single week. (sbnation.com)