[1] Javorova Kosa Tunnel was designed by Inženjersko projektni zavod and its construction was started by Spie Batignolles and Mediteran Union Tunel.

The construction works contract was cancelled in 2001, with 232 metres (761 ft) of the tunnel left to excavate.

[5] Construction of the tunnel was hindered by low air temperatures, dropping to −32 °C (−26 °F).

[8] Traffic is regularly counted and reported by Autocesta Rijeka–Zagreb, operator of the A6 motorway and the tunnel, and published by Hrvatske ceste.

Substantial variations between annual (AADT) and summer (ASDT) traffic volumes are attributed to the fact that the motorway carries substantial tourist traffic to Istria and Kvarner Gulf resorts.