** BIJELA VLAKA**

Immediately behind the viaduct Pavlovici, the highway route penetrates through the hill of BijelaVlaka with the tunnel of the same name. The length of the tunnel is 413 m, which does not require transverse connections or significant equipment, except for lighting, firefighting and video surveillance. It is also a classic tunnel with two pipes with two 3,75 m wide tape bridges and service paths above the energy channels. The largest super sound is up to 30 m, which resulted in a crushing, basically solid limestone rock. The distance of the pipe axis is at least 23 m. During construction, the highest standards for this type of facility have been respected.

** 1. MART**

Tunnel 1 March is one of the most important objects on Corridor Vc. The lengths of almost three kilometers are classified among the longest road tunnels in BiH. It was built using the New Austrian Tunnel Method (NATM). It is the latest tunnel in the region, and it is equipped with numerous systems and LED lighting as well as video surveillance that monitors and detects all potential problems in the tunnel. The route of the tunnel of the tunnel on the 1st of March passes through the Vijenac Hill in the direction north-south. The tunnel is designed as two-way, with two traffic lanes in each pipe. The spacing of the tunnel pipes is 25 m. The entrance portal of the tunnel is at an altitude of 359 meters, and the exit at a height of 383 m. The tunnel has 11 transverse bridges between tunnel tubes, nine pedestrian and two for motor vehicles. The maximum permitted speed of the tunnel is 100 km / h. Each piping is provided with two parking lots. Inbound portals are executed and completely adapted to the field configuration.

** OŠTRIK**

The tunnel passes through the hill Oštrik. The length of the left tunnel tube including the portal building is 273 m, while the right tunnel tube is 303 m long. Oštrik Tunnel is designed as two-pipe with two traffic lanes in each pipe. The tunnel construction tunnel included the rehabilitation of the existing right tunnel tube with the extraction at the sites in order to achieve the full width of the profile and the complete construction of the left tunnel tube. It is equipped with state-of-the-art surveillance and traffic management system.

** OŽEGA**

The passage of the route through the Ozege hill is accomplished with a two-pipe tunnel, after which the route gradually descends into the valley of Reljevskopolje. The length of the left tunnel tube including the portal building is 393 m, while the right length is 382 m. During the construction of the tunnel, the NATM method (New Austrian tunnel method) was used. It is equipped with state-of-the-art surveillance and traffic management system. Supervision is carried out on a daily basis, 24 hours a day from the Center for Maintenance and Traffic Control (COKP) Drivuša.

** GAJ**

The passage of the highway route through the Gaj Hill was realized with the same name two-pipe tunnel, length 855 m. The Niveleta tunnel is located in a convex vertical curve, with the largest longitudinal slope of 2.5%, and the entire tunnel is in the direction. The maximum overhead above the tunnel is 50 m. The Gaj Tunnel was built by the New Austrian tunnel method in extremely difficult geological conditions, and the convergence of the secondary lining was spaced up to 25 cm. The tunnel contains two transverse links between the left and right pipes allowing the evacuation of pedestrians in the event of a fire. It has a modern fire-fighting system with hydrant nets, ventilation system, telephone dial-up system and lighting system. It is also equipped with state-of-the-art traffic monitoring and control system.

** IGMAN**

The tunnel is designed for a full motorway profile with two tunnel tubes at a minimum distance of 25 m from the pipe axis. The average length of tunnel pipes is 338 m, and the adopted shapes and positions of the portal are such that they fit as much as possible into the natural terrain. Such solutions are the least harmful to natural conditions, which makes the motorway of higher quality. The tunnel has a maximum overlap of 50 m. It was built by the New Austrian Tunnel Method (NATM) in some bad geological conditions. Above the tunnel there is a village, so during the construction process, geodetic surveillance of ground surface movements is constantly performed. The portal portal security is a very complex geotechnical construction based on a double row of piles with a headset. The Igman tunnel has a lighting system and other necessary equipment with the most modern system for traffic monitoring and control.

** VIS**

This is the third two-pipe tunnel on the Sarajevo-Tarčin section with an average length of 861 m. The smallest overlay is in the middle and it is 15 m, and the maximum 120 m. The axis of the tunnel is guided in a curve with a minimum radius of 1400 m, while the level track in the tunnel with a constant longitudinal slope of 3.6% in the right pipe and 3.9 in the left tunnel tube. It was built using the New Austrian Tunnel Method (NATM). There are three cross-links between the left and right pipes allowing the evacuation of pedestrians in the event of a fire. The tunnel includes a fire protection system with hydrant nets, a forced ventilation system, a telephone dial-up system, a lighting system and other necessary equipment.

** 25. NOVEMBAR**

The tunnel is located at the very beginning of the Suhodol – Tarčin sub office and is one of the most complex objects on the entire Corridor Vc. It is made for the full profile of the motorway, with two tunnel pipes on the mutual axis of the axis of 25 m. The tunnel has a maximum overhang of 200 m and the average length of tunnel tubes is 2771 m. It is in a convex vertical curve with a maximum slope of 3.6%. The axis of the route is in a horizontal curve with a radius of 1360 m. It was built using the NATM tunneling method. The tunnel on November 25 due to its length has two parking lots and even 11 transverse connections between the tunnel tubes.

** GRAB**

The tunnel is located at the very end of the Suhodol-Tarcin sub-unit. The average length of tunnel pipes is 402 m, with a constant longitudinal fall of 0.7% and a minimum horizontal radius of 2675 m. Like the rest, it was built by the New Austrian Tunnel Method (NATM). The Grab Tunnel has a maximum overlap of 100 m. The highway route crosses the railway line in this section. The height difference between the highway and the railway line at this place is only 27 m, which additionally required the construction of the tunnel. The Grab tunnel emerges from the hill almost parallel with the iso-vessels, in very difficult and changing geological conditions, so the northern portal was necessary to provide a complex 36 m high supporting structure.

** STUDENČICA**

Studenčica Bridge is the largest facility on the Medjugorje – Bijača suburb. It overcomes the stretch of the Studencica River. The length of the bridge is 555 m, and the highest height is about 90 m, which makes it one of the largest facilities of this kind in BiH. Due to the high pillar height and wide range, a monolithic, pre-stressed span construction of a box-shaped, variable section made by the system of free cantilever construction was selected. The construction challenge was also the fact that the bridge is located in the vertical and in the two horizontal curves, which leads to the pavement of the pavement and construction.

** TREBIŽAT**

The canyon of the Trebižat River motorway crosses the bridge 500 m downstream from the waterfall of Kravica with a beautiful view from the right bridge. The position is characterized by a large valley, a steep and inaccessible terrain, and a request for minimizing the environmental impact due to the almost untouched nature. These facts were dictated by the choice of construction: box-shaped square columns, box-shaped spacing construction of variable cross-section made by the system of free cantilever construction. The main ranges are 120 m. The length of the bridge is 380 m, and the height is 65 m. Geological conditions and steep, inaccessible terrain were dictated by foundation on round wells with a diameter of 9 m and a depth of 12.5 m.

** PAVLOVIĆ**

After the Studenčicabridge and a long 300 m long, there is an altitude leading up to the Studenčica mouth in Trebizat. The valley is bordered by Pavlovici viaduct. The viaduct is 360 m long. The pillars are small, small stiffness, based mainly on shallow foundations, except for the first two pairs of pillars where the foundation was made on piles of length up to 12 m. The layout and height of the pillars dictated the choice of a box-like spreading structure with a constant height of 3.5 m. The span construction is carried out by the gradual push-pull technology. The range of 9 × 43 m is mastered in 17 cycles of 23 m. The viaduct is in the horizontal curve.

** VLAKOVO **

The viaduct is 390 m long and is located on the Sarajevo-West loop, which represents the entrance to Sarajevo. The circular flow and the mild valley are bridged with 14 ranges. It consists of two separate spans constructed in the radius curve of 1200 m, with a drop of 0.8%. The span assembly of the bridge is a paneled pre-stressed construction with a thickness of 135 cm. Bodies of middle pillars are concrete, rectangular cross-section with curves. The foundation is on piles.

** GLADNO POLJE
**

The viaduct bridges the shallow valley with 12 ranges, 24 to 30 m in length. It consists of two separate spacers constructed in a slope of 1.8%. The complexity of this object is reflected by the fact that the axis of the highway bridge moves from the turning point to the direction, and again into the passage. The span assembly of the bridge is a paneled pre-stressed construction with a thickness of 135 cm. The bodies of the middle pillars are a concrete rectangular cross-section with circles. The foundation of the pillars is on piles.

** ŠAMIN GAJ **

The viaduct consists of two separate spanning structures that bridges the shallow valley and resolves collision with the M-5 magistral road. The axis of the road on the viaduct is in the direction, with a longitudinal inclination of 0.7%. The spacing is a reinforced concrete slab, with a thickness of 135 cm, with 12 ranges of 24 and 30 m long. The reinforced-concrete bodies of the middle pillars are rectangular cross-section with curves at the ends. The foundation was made on piles.

** LEPENICA 1**

The bridge consists of two separate spacing structures which overlap the local road, the Lepenica River and the valley with 8 ranges of lengths of 26, 28, 30 and 32 m. The axis of the road on the bridge has the smallest curvature radius of 3100 m. Niveleta roads on the bridge are in a concave vertical curve. The span assembly of the bridge is a paneled, pre-stressed construction with a thickness of 140 cm. The bodies of the middle pillars are concrete, rectangular cross-section with sloping edges, and at a height of 4 m below the span structure, they are crunched. The foundation is shallow at basic rates.

** LEPENICA 2**

The bridge consists of two separate spacing structures that bridge the Lepenica River, the local road and the steep valley. The axis of the motorway on the bridge is in the curve of a large radius of 3100 m. The left and right road lanes have a constant inclination of 3.6 and 3.9%. The cross section of the bridge consists of five prestressed concrete supports monolithic with concrete pavement. The bodies of the middle pillars are concrete, rectangular cross-section with sloping sides and with a bearing shaft at the top. The foundation is shallow at basic rates.

** BIJELA **

The bridge consists of two separate four-tier spacing constructions that bridge the stream Bijela and the steep valley. The highway axes on the bridge are in the horizontal curves of large radii of 2750 m and 2675 m, while the level in the longitudinal fall of 0.7%. The bodies of the middle pillars are armored-concrete, rectangular cross-section. The foundation is shallow at concrete feet, and in places with weaker geotechnical characteristics it is made on piles.