D37 is a state road in Banovina region of Croatia connecting Sisak, Petrinja and Glina.

[maps 1] The road is 34.4 km (21.4 mi) long.

[1] Just like all other state roads in Croatia, the D37 is managed and maintained by Hrvatske ceste, a state-owned company.

[2] Traffic is regularly counted and reported by Hrvatske ceste, operator of the road.

[3] Section of the road running through Sisak is not covered by the traffic counting sites, but the section is assumed to carry a substantial volume of urban traffic in addition to the regular D37 traffic.