D300 road
Road in Croatia
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Traffic volume
Traffic is regularly counted and reported by Hrvatske ceste, operator of the road.[4] Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the road connects A9 motorway carrying substantial tourist traffic to Umag, a major summer resort.
| D300 traffic volume | ||||
| Road | Counting site | AADT | ASDT | Notes |
 D300 |
2705 Grando | 5,284 | 6,636 | The westernmost traffic counting site on D300. |
| D300 |
2718 Buje west | 6,335 | 8,571 | The easternmost traffic counting site on D300. |
Road junctions and populated areas
| D300 junctions/populated areas | |
| Type | Slip roads/Notes |
 |
 D21 to Krasica and to Kaštel border crossing to Slovenia.Eastern terminus of the road. |
|
Ž5070 to Brtonigla |
 |
Umag interchange: A9 motorway to Pula (to the south) and to Ž5002 road (to the north) which serves as a short connecting road to D200 and D510 state roads leading to border crossings Kaštel and Plovanija to Slovenia. |
|
L50011 to Kršete and Brtonigla |
 |
Materada |
|
Juricani L50008 to Čepljani |
|
Petrovija L50006 to Vilanija |
|
Finida |
|
Umag: Ž5002 to Novigrad to the south and Savudrija to the north Western terminus of the road. |