Another word for roadblock

Roadblock: This clue is usually extremely vague and only one team member is allowed to complete the task assigned.

Roadblock is a task for just one member of a team.

Players must split the roadblock tasks evenly so each person participates in an equal number of roadblocks during the race.

If a roadblock pops up, Sagittarius will jauntily walk around it.

In an interview with Autism Speaks, he shared his belief that an autism spectrum disorder is not a roadblock to success.