21.   Traffic is getting worse.

22.   Traffic often gets heavy and confused at water stations, and it is much safer if someone else does the work.

23.   Arrive early, because traffic gets heavy quickly during the festival.

24.   Since traffic could not get through the police lines, there were few people at work in businesses and shops.

25.   With the schools just reopened the traffic has gotten heavier and many schoolchildren who walk to the nearby schools are very much in danger.