March 29, 2023

Europa - Bridges

 The first stamp features Megyeri Bridge, which is 1,861 metres long and is Hungary’s second-longest bridge and the longest bridge over a river in the country. Horizontally, the bridge is composed of five dilation sections: two end parts, which stand in flood areas, the central section on Szentendre Island, and two other parts which span the main branch of the Danube and the Szentendre branch of the Danube. The 600-metre-long structure with a 300-metre central opening over the main branch of the Danube is the first cable-stayed bridge in Hungary and its 100-metre tall pylons form large letter “A”s. On one leg of the pylon, there are stairs and on the other a lift. The bridge was built as part of the northern sector of the M0 ring motorway around Budapest between 2006 and 2008. The outstanding engineering achievement is a worthy member of the family of bridges over the Danube.

The other stamp presents Kőröshegy Valley Bridge, which is 1,872 metres long. This is currently Hungary’s longest bridge and is located on the section of the M7 motorway running along Lake Balaton near Kőröshegy and Balatonföldvár. The 17-arched, pre-stressed monolithic concrete structure was built between 2004 and 2007. The span between the pillars is 120 metres and the tallest pillar is 80 metres high. There are stairs in every pillar and a lift in two of them to facilitate inspecting the bridge. As a result of a 3% incline, there is a 53-metre difference in height between the two ends of the bridge. Taking account of environmental considerations, all the rainwater from the bridge is collected and treated in several stages before being allowed back into the natural surroundings. It is a unique and remarkably impressive feat of civil engineering.

Stamp Issue: 2018.05.02

Grand Opening of Pelješac Bridge

 The Pelješac Bridge is a part of the national road which goes around the Neum Corridor. It is a part of the project called "Road Connection with Southern Dalmatia". The project includes the construction of the bridge, access roads to the bridge as well as the Ston bypass, which has enabled the establishment of a strong road connection between the separated parts of the land territory of the Republic of Croatia. The 32.5 kilometers long two-lane state road connects the far south and is an essential prerequisite for the development of the mainland and islands of the Dubrovnik area. The 2404 meters long Pelješac Bridge is the most challenging part of the project and it crosses a sea strait – the Mali Ston Channel. The project "Road Connection with Southern Dalmatia" is a strategic interest of the Republic of Croatia. It is also located on one of the European transport corridors, therefore it has been largely financed from EU funds.


The width of the sea channel at the bridge site is 2140 meters, and the average sea depth is 27 meters. A waterway passes through the bay, which is protected as a special nature reserve: the designated navigation passage is 200 meters wide and 55 meters tall. The foundation soil, which consists of deep silt and clay deposits above a rock layer, was a challenge to the designers, as were the seismicity of the location and a significant likelihood of strong winds. The task of bridging the sea channel in such complex circumstances was achieved through a unique construction consisting of a suspension bridge with six pylons and five main openings measuring 285 meters each, on deep foundations built on driven piles.

There is a total of 13 openings with start and end support on bridge abutments and a total of 12 in-between support elements. The concept of a bridge without a pronounced central span, symmetrical and with no extremely tall pylon verticals, with a series of identical spans over the central part of the channel and with clearly defined, repetitive elements of pillars, girders, and stay cables was adopted. The construction of the bridge started in mid-2018 and ended in early 2022. The investor of the entire project was Hrvatske ceste, a Croatian company for the management, construction, and maintenance of state roads, while the main contractor was the Chinese company China Road and Bridge Corporation, alongside which numerous Croatian companies and individuals worked on the project.

Stamp Issue: 2022.07.26

Europa - Bridges

At the beginning of the 18th century, after the end of the War of the Spanish Succession and the war against the Ottoman Empire, the conditions to revive the economy and trading in the area of Croatia were met creating a need to connect Pannonia with the coastal area by a road through the mountainous area of Gorski kotar. In 1718, the Croatian Parliament approved the proposal to build a road from Karlovac through Novigrad na Dobri, Delnice, and Javornik to the port in Kraljevica. However, the construction started a while later, in 1725, and was fully completed in 1738. The designer and builder of the road named Via Carolina Augusta, today known as Karolinska cesta, was Matija Antun Weiss (1661 – 1738). The road was named after the ruling emperor, Charles IV, who personally traveled the passable section of the route in 1728. The road is around 60 miles or roughly 106 km long and the planned costs were 70,000 forints. In order to cross over certain streams and rivers, several bridges had to be built on the road, typically wooden constructions on stone columns and abutments.

Among the bridges on the River Dobra, the bridge near Novigrad na Dobri especially stands out. It was built using cut stone. The bridge is located in a tame valley of the river not too far from a castle built on a hill at the beginning of the 16th century. It was owned by the Frankopan, Zrinski, and Patačić families. According to some accounts regarding bridge tolls, there was a wooden bridge prior to this one in the same location.

The bridge is 114.5 m long, and 5.8 m wide and it crosses the river with 10 semi-circular arches with a span of 4.9 m. The columns are massive and harmoniously shaped with pronounced extents. The fences are made of stone, 0.5 m wide and 0.6 to 0.75 m high. The bridge grade level is convex with the highest point in the middle of the bridge. In terms of the layout, the bridge is perpendicular to the river flow. It is an interesting fact that, according to some accounts, the owners of the castle and the surrounding properties had to finance the bridge construction even though the road was financed by the Viennese court.

The bridge is a valuable monument to the bridge building skill and it is in relatively good condition considering that it is more than 250 years old and a protected cultural monument.

The bridge on the River Dobra can be reached from an exit on the Zagreb – Rijeka Highway 1 at the Novigrad junction and then by a local road leading to Novigrad na Dobri. 


The Franjo Tuđman Bridge (Croatian: Most dr. Franje Tuđmana) is a cable-stayed bridge carrying the D8 state road at the western approach to Dubrovnik, Croatia across Rijeka Dubrovačka near Port of Gruž. The original bridge design was developed in 1989; however, construction was stopped at the onset of the Croatian War of Independence. Named after the 1st President of Croatia Franjo Tuđman, the bridge has been redesigned by the Structures Department of the University of Zagreb.

The bridge is 518-meter (1,699 ft) long, measured between the abutments. The substructure of the bridge consists of abutments, a pier on the western shore supporting a pretensioned girder, and an anchoring pier on the eastern shore.

The supported structure on the cable-stayed portion of the bridge consists of a composite girder, an A-shaped pylon, and the cable-stays. The overall span of the girder is 324.7 m (1,065 ft). Concrete roadway slab is of the generally constant depth of 25 cm (10 in). A total of 38 cable stays have been executed, comprising 27 to 61 steel wire cables placed in protective polyethylene pipes.

The pylon is 141.5 m (464 ft) tall, measured from the top surface of the foundations. It comprises a box cross-section of varying sizes. An additional box girder is executed just below the suspended structure providing it additional support as well as bracing the pylon legs. The cable stays are anchored to the top of the pylon. A special opening has been executed in one of the pylon legs, next to the sidewalk, providing access to the inside of its cross-section, where there are rungs facilitating climbing to the top of the pylon, where another opening on its top allows replacements of the anchors, should that become necessary.

The western part of the bridge comprises a pretensioned girder of variable depth 3.25 m (10.7 ft) at the abutment, 8.22 m (27.0 ft) at the pier, and 3.2 m (10 ft) at the end of the cantilever.

Construction of the bridge started in October 1998. The construction works were carried out by Walter Bau AG and Konstruktor, Split. Construction was completed in April 2002, and the bridge was officially opened on May 21, 2002. The bridge construction costs were reportedly 252 million Croatian kuna (c. US$31 million) making Franjo Tuđman Bridge the most expensive bridge in Croatia.

Stamp Issue: 2018.05.02

March 28, 2023

Bridges and viaducts

Third Guards Brigade 'Kune' Bridge

The A5 Highway on the Beli Manastir - Osijek - Svilaj (r. Sava) route, a component of the C5 branch of the European network carrying the following mark: E73, which is located on the west side of the city of Osijek, near Petrijevci, was supposed to bridge the Drava River and its inundation area. So as not to create a barrier to the future expansion of Osijek, as well as to the possibility of building a hydroelectric power plant on the r. Drava, as a result of a process of choosing a crossing project solution, a bridge with a total length of 2,485 (2,507) m and access viaducts was created. What is interesting is that the Drežnik viaduct near Karlovac is the same length as the "Kune" Bridge, so these two objects share the first place in Croatia with regards to their size. By comparison, the Pelješac Bridge is 2,440 m long.

The bridge consists of three parts: a) the Baranja side access road over the inundation (length: 1,074.5 m, 28 + 29 x 35 + 31.5 m), b) the bridge crossing the Drava river (length: 420 m, 100 + 220 + 100 m), and c) the Osijek side access road (length: 990.5 m, 24.5 + 28 + 26 x 35 + 28 m). Both access roads were built as two separate viaducts, one for each direction. They have span structures made of prestressed T-section concrete supports (height: 1.85 m), with six of them in cross-section, and are connected with a 25 cm thick pavement slab, supported with two Φ 1.8 m columns lying over the overhead beams. The foundations are based on drilled pylons (Φ: 1.5 m). The span structures of both access roads are divided into six expansion units. The center of the object is the part that bridges the Drava, which has been designed with a suspended span construction, with spans of 100 m + 220 m + 100 m, and 75 m tall type A pylons. The pylons are made of reinforced concrete, with a 4 x 5 m (at the top: 3.5 x 6 m) section of arms. From pylons on both sides, a row of 10 diagonal tension rods composed of high-quality steel ropes descends and stretches across. The tension rods are protected by ribbed HDPE pipes. The pylon arms are based on two batches of 25 drilled pylons with a 1.5 m diameter. The span construction of this part, which consists of a three-chamber steel box girder with a cross-section of approx. 12 x 2.8 m, and 8.3 m long prominent consoles supported by steel beams, is supported by the tension rods described, which transmit force to the pylons. The tension rods connect to the span structure in the central chamber of the structure. The total width of the span structure in this part (420 m) is 28.6 m.

The authors of the Concept Project are Peter Sesar, Ph.D. (Civil Engineer) and Damir Tkalčić, M. Sc., while the author of the Main Project is Damir Tkalčić, M.Sc. The construction works were performed by a business association consisting of the following companies: Viadukt d.d., Zagreb; Osijek Koteks d.d., Osijek; Konstruktor Inženjering d.d. and Skladgradnja grup d.d., (both from Split), as well as Hidroelektra - Niskogradnja d.d., Zagreb. The labor contract price of the project in 2009 was approx. 950 million HRK. 

Mirna Viaduct

The A9 highway (Istrian Y highway) connects the city of Pula and famous tourist centers on the west coast of Istria via the Plovanija and Kaštel border crossings with Ljubljana and Trieste, and further on with various cities of Western Europe. On the Nova Vas - Višnjan subsection of this 76.8 km long highway, the floodplain of the Mirna River is bridged by a magnificent viaduct (bridge), with a total length of 1,378 m. In addition to the Mirna River, under the viaducts, there are two smaller canals and a road. The object was built on the route of the right carriageway of the highway. The viaduct for the left carriageway will be built within the scope of the complete project of the A9 highway, which will help this highway reach its full profile. Near the viaduct, the Mirna River meets the sea, and the city of Novigrad is located. The valley below the viaduct offers valuable agricultural crops.

The span construction of the viaduct consists of two solid steel walls with tin carriers of constant height (2.75 m) at a distance of 5.50 m. The carriers are connected by steel cross-members and a 25 cm thick reinforced concrete pavement slab. The static system is a continuous carrier stretching over 22 spans, with a total length of 1,353.86 m. The sizes of the spans are as follows: 51.1 + 15 x 66.5 + 70.1 + 2 x 50.1 + 63.1 + 42.6 + 30.6 m.

The total width of the object is 10.10 m, and it consists of two traffic lanes, each 3.5 m wide, and two protective belts, each 1.0 m wide, as well as protective fence areas, each 0.5 m wide. The ground plan of the viaduct follows a curve (R = 4,005 m). The height of its columns ranges from 13.5 to 40.0 m. Its H section is 4.5 x 3.8 (2.5) m wide and made of reinforced B35 concrete. The abutments, as well as the lower columns, are supported by a rock, while the higher columns, due to weak load-bearing soil, are based on steel 61 m long pylons, connected with reinforced concrete, and a 2.0 m thick headboard. When it comes to the quantity of materials used for the construction of the viaduct, it is as follows: B35 concrete –11,190 m3; BSt 500S reinforcing steel - 1,831 tons; structural steel of span construction St 52-3 – 2,720 tons. Investor: BINA-Istra; Designer: Zlatko Šavor, Ph.D., Master of Civil Engineering. Contractor: Bouygues France. Zvonimir Zdenko Šimunjak, Master of Civil Engineering

Stamp Issue: 2023.03.20