Sets related to construction sites were already a part of Town when it was initially released in 1978. In the following years, the subject remained a regular element of Town with at least one related release in almost every year until the end of City Center in 2000. There were no new System sets until the introduction of City in 2005, which brought a large number of new releases as well as substantial changes. Many of the new vehicles were bigger than in the older Town sets, giving them a realistic size ratio when compared to the included minifigures but also causing a combination of older and new sets to look somewhat awkward. City last made Construction sets in 2009.