When referring to a situation where there is an excessive amount of people or vehicles in a specific area, the term "become congested" is often used. However, there are several synonyms that can be used interchangeably depending on the context. For instance, the phrase "become clogged" can be used to describe traffic or a narrow passage. Additionally, the terms "gridlock," "jammed," and "backed up" are used interchangeably to refer to the same situation. Furthermore, "overcrowded" can be used to describe a space where there is an excessive amount of people. In summary, when referring to a situation where there is a lot of traffic or people in an area, there are several synonyms that can be used depending on the context.