The Grič Tunnel is a four-lane tunnel in Lika region of Croatia, an integral part of the A1 motorway located between Otočac and Ličko Lešće interchanges. The Grič Tunnel is located to the south of Plasina Tunnel. The tunnel is tolled within the A1 motorway closed toll collection system, and there are no separate toll plazas related to the tunnel use.
The tunnel consists of two tubes, excavated in 2003 and opened for traffic in 2004. Length of the northbound tunnel tube is 1,214 metres (3,983 ft), while the southbound one is 1,231 metres (4,039 ft) long. The tunnel carriageways consist of two 3.5 metres (11 ft) wide driving lanes and two 0.35 metres (1.1 ft) wide marginal strips. 0.9 metres (3.0 ft) wide inspection sidewalks are present in both of the tunnel tubes. Electronic equipment of the tunnel facilitates use of two UHF frequencies and use of cell phones. Speed limit applied in the tunnel is 100 km/h. In 2006 the Grič Tunnel was declared to be the second safest tunnel in Europe by the EuroTAP survey run by FIA and the German motoring club ADAC.