| Country: | HRV |
| Type: | D |
| Route: | 121 |
| Length Km: | 14.0 |
| Length Round: | 1 |
| Terminus A: | Murter |
| Terminus B: | D8 and D59 near Pirovac |
| Counties: | Šibenik-Knin |
| Cities: | Murter, Tisno, Pirovac |
D121 is a state road connecting the island of Murter with D8 state road near Pirovac.
The southern terminus of the road is located in the town of Murter. The northern terminus is immediately to the south of Pirovac. The intersection with D8 state road, where D121 terminates, also represents the southern terminus of D59 state road to Knin. The road is 14km (09miles) long.[1]
The road crosses from the mainland to the Murter Island in Tisno via a movable bridge. The bridge is raised twice a day for 30 minutes to allow passage of vessels through the strait.[2]
The road, as well as all other state roads in Croatia, is managed and maintained by Hrvatske ceste, a state-owned company.[3]
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 serves as an approach to a number of resorts, carrying considerable tourist traffic.
| D121 traffic volume | |||||||||
| align=center bgcolor=00c0f0 | Road | align=center bgcolor=00c0f0 | Counting site | align=center bgcolor=00c0f0 | AADT | align=center bgcolor=00c0f0 | ASDT | align=center bgcolor=00c0f0 | Notes |
| D121 | 5304 Murter | align=center | 2,489 | align=center | 4,920 | Between two Ž6250 junctions. |