The level of street-network sprawl in new development in Kocaeli rose steadily. To get a sense of how street development has changed in Kocaeli, we can consider three of its most populous cities: Kocaeli, Gölcük and Karapınar. None of the most populous cities follow the same trend as the region. The level of street-network sprawl in new development in Kocaeli followed a zig-zag trend with an overall increase. The level of street-network sprawl in new development in Gölcük peaked in 1976-1990. The level of street-network sprawl in new development in Karapınar peaked in 1976-1990.

As of 2020, the city with the most disconnected street network in Kocaeli is Karapınar with an SNDi of 2.89, which is moderately connected. Conversely, the most connected city is Kocaeli with an SNDi of 2.14, which is well-connected. See trends for these cities: Kocaeli, Karapınar

The level of street-network sprawl in the aggregate network in Kocaeli rose steadily. To get a sense of how the aggregate street network has changed in Kocaeli, we can consider three of its most populous cities: Kocaeli, Gölcük and Karapınar. Out of the three cities, Gölcük and Karapınar do not follow the same trend as the region. The level of street-network sprawl in the aggregate network in Gölcük peaked in 1991-2005. The level of street-network sprawl in the aggregate network in Karapınar peaked in 1976-1990.