A pull factor is a positive perception about a location that influences a person to move there. A push factor is a negative perception about a location that induces a person to move away from that location. Both push and pull factors are based on an individual's perceptions of the area. A pull factor for one person may be a push factor for another.

In the harbor, the ships' horns blew.

Once the schools break up for the holidays, children across the country are at a loose end and instances of kids doing stupid things on the railway become far too common.

Until the recent rash of North London line maps appeared on station billboards in the London area of BR, the service undoubtedly suffered from meagre and ineffectual publicity.