Complex sentence: The D534 state road traffic volume is not reported by Hrvatske ceste, however they regularly count and report traffic volume on the A1 motorway Gospić interchange, which connects to the D534 road only, thus permitting the D534 road traffic volume to be accurately calculated.
Split into simpler sentences: The D534 state road traffic volume is not reported by Hrvatske ceste. However, they regularly count and report traffic volume on the A1 motorway Gospić interchange, which connects to the D534 road only, thus permitting the D534 road traffic volume to be accurately calculated.