The concept of "port congestion" refers to delays
http://shanefjvj475.theburnward.com/robotics-and-beyondpastover-and-aboveoutside-offurther-than-transformingreworking-educationtrainingschoolingeducation-and-learninginstruction-for-childrenfor-kidsfor-youngsters
The concept of "port congestion" refers to delays and inefficiencies caused by high volumes of cargo in maritime shipping