Complex sentence: The D526 state road traffic volume is not reported by Hrvatske ceste, however they regularly count and report traffic volume on the A4 motorway Varaždinske Toplice interchange, which connects to the D526 road only, thus permitting the D526 road traffic volume to be accurately calculated.
Split into simpler sentences: The D526 state road traffic volume is not reported by Hrvatske ceste. However, they regularly count and report traffic volume on the A4 motorway Varaždinske Toplice interchange, which connects to the D526 road only, thus permitting the D526 road traffic volume to be accurately calculated.