D37 road (Croatia)D37 is a state road in Banovina region of Croatia connecting Sisak, Petrinja and Glina. The road is long.Just like all other state roads in Croatia, the D37 is managed and maintained by Hrvatske ceste, a state-owned company.Traffic volumeTraffic is regularly counted and reported by Hrvatske ceste, operator of the road. 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.