The Hovenring is a suspended

cycle path A bike path or a cycle path is a bikeway separated from motorized traffic and dedicated to cycling or shared with pedestrians or other non-motorized users. In the US a bike path sometimes encompasses ''shared use paths'', "multi-use path", or "C ...

roundabout A roundabout, a rotary and a traffic circle are types of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junct ...

in the province of

North Brabant North Brabant ( ; ), also unofficially called Brabant, Dutch Brabant or Hollandic Brabant, is a province in the south of the Netherlands. It borders the provinces of South Holland and Gelderland to the north, Limburg to the east, Zeeland to ...

in the

Netherlands , Terminology of the Low Countries, informally Holland, is a country in Northwestern Europe, with Caribbean Netherlands, overseas territories in the Caribbean. It is the largest of the four constituent countries of the Kingdom of the Nether ...

. It is situated between the localities of

Eindhoven Eindhoven ( ; ) is a city and List of municipalities of the Netherlands, municipality of the Netherlands, located in the southern Provinces of the Netherlands, province of North Brabant, of which it is the largest municipality, and is also locat ...

Veldhoven Veldhoven () is a Municipalities of the Netherlands, municipality and town on the Gender (stream), Gender in the southern Netherlands, just southwest of Eindhoven, in the Provinces of the Netherlands, province of North Brabant. Topography Map of ...

, and Meerhoven, which accounts for its name, and is the first of its kind in the world.

History

The Hovenring was first conceived of in 2008, when increased traffic between Eindhoven and Veldhoven was starting to overwhelm the capacity of the

on the crossing of the roads known as ''Heerbaan'' in Veldhoven and the ''Meerenakkerweg'' (''Heistraat''). In order to improve the flow of traffic and improve safety, it was decided to completely separate motorized and bicycle traffic. In addition, it was decided to transform the roundabout for cars into a regular crossing of streets, to improve the flow of traffic. This left a decision to be made about what to do about the bicycle traffic. The city council of Eindhoven decided that they wanted to develop an eye-catching project, in keeping with ambitions of the ''Brainport'' top technology region (a

knowledge economy The knowledge economy, or knowledge-based economy, is an economic system in which the production of goods and services is based principally on knowledge-intensive activities that contribute to advancement in technical and scientific innovation. ...

-driven cooperative of the

municipalities A municipality is usually a single administrative division having municipal corporation, corporate status and powers of self-government or jurisdiction as granted by national and regional laws to which it is subordinate. The term ''municipality' ...

in the Eindhoven metropolitan area). The design for the Hovenring was made by the ''ipv Delft'' design agency. The name was chosen through a competition held among the population of Eindhoven and Veldhoven. Literally the name means "ring of the Hovens", referring to Eindhoven, Veldhoven and Meerhoven (the

residential area A residential area is a land used in which housing predominates, as opposed to industrial and commercial areas. Housing may vary significantly between, and through, residential areas. These include single-family housing, multi-family residen ...

of Eindhoven where the Hovenring is). In addition, the name refers to the suspended ring of the Hovenring, as well as to the ring and needle (the central pylon) of lights that are formed by the lights that adorn the construction. With the addition of the lights, the name also refers to Eindhoven's unofficial designation of "city of lights". The construction started on 11 February 2011. The new crossing was opened on 30 December 2011. About a week later, the crossing was again closed for all traffic, because the suspension cables were found to vibrate in a manner that was considered harmful. The Hovenring was finally opened to the public on 29 June 2012.

Construction

Design

The Hovenring is officially a roundabout, but in fact it is a

circular Circular may refer to: * The shape of a circle * ''Circular'' (album), a 2006 album by Spanish singer Vega * Circular letter (disambiguation), a document addressed to many destinations ** Government circular, a written statement of government pol ...

cable-stayed bridge A cable-stayed bridge has one or more ''towers'' (or ''pylons''), from which wire rope, cables support the bridge deck. A distinctive feature are the cables or wikt:stay#Etymology 3, stays, which run directly from the tower to the deck, norm ...

with the diameter deck suspended from a single tall central pylon by 24 cables. The entire construction is made of steel.

Vibration issues

The suspension bridge had to be closed almost immediately after delivery due to unexpected vibrations in the cables caused by the wind. An investigation of the problem was undertaken during the next several weeks by professors of

civil Civil may refer to: *Civility, orderly behavior and politeness *Civic virtue, the cultivation of habits important for the success of a society *Civil (journalism) ''The Colorado Sun'' is an online news outlet based in Denver, Colorado. It lau ...

and

mechanical engineering Mechanical engineering is the study of physical machines and mechanism (engineering), mechanisms that may involve force and movement. It is an engineering branch that combines engineering physics and engineering mathematics, mathematics principl ...

from the

Eindhoven University of Technology The Eindhoven University of Technology (), Abbreviation, abbr. TU/e, is a public university, public technical university in the Netherlands, situated in Eindhoven. In 2020–21, around 14,000 students were enrolled in its Bachelor of Science, BS ...

, the

Delft University of Technology The Delft University of Technology (TU Delft; ) is the oldest and largest Dutch public university, public Institute of technology, technical university, located in Delft, Netherlands. It specializes in engineering, technology, computing, design, a ...

and

professor Professor (commonly abbreviated as Prof.) is an Academy, academic rank at university, universities and other tertiary education, post-secondary education and research institutions in most countries. Literally, ''professor'' derives from Latin ...

Alberto Zasso of the

Politecnico di Milano The Polytechnic University of Milan (, abbreviated as PoliMi) is a university in Milan, Italy. It is the largest technical university in the country, with about 40,000 enrolled students. The university offers undergraduate, graduate, and higher ...

. It was finally determined that the problem was

vortices In fluid dynamics, a vortex (: vortices or vortexes) is a region in a fluid in which the flow revolves around an axis line, which may be straight or curved. Vortices form in stirred fluids, and may be observed in smoke rings, whirlpools in th ...

of wind forming in the lee of the cables, causing far heavier

vibration Vibration () is a mechanical phenomenon whereby oscillations occur about an equilibrium point. Vibration may be deterministic if the oscillations can be characterised precisely (e.g. the periodic motion of a pendulum), or random if the os ...

s than expected during design. A solution was found by applying additional

damper A damper is a device that deadens, restrains, or depresses. It may refer to: Music * Damper pedal, a device that mutes musical tones, particularly in stringed instruments * A mute for various brass instruments Structure * Damper (flow), a mech ...

s on the cables. Unfortunately this caused an extra delay of a month in the opening of the bridge, since the contractor initially mounted the dampers incorrectly.

Comparison

An important predecessor to the Dutch design is the cycle

overpass An overpass, called an overbridge or flyover (for a road only) in the United Kingdom and some other Commonwealth countries, is a bridge, road, railway or similar structure that is over another road or railway. An ''overpass'' and '' underpa ...

roundabout of Tjensvollkrysset in

Stavanger Stavanger, officially the Stavanger Municipality, is a city and municipalities of Norway, municipality in Norway. It is the third largest city and third largest metropolitan area in Norway (through conurbation with neighboring Sandnes) and the ...

Norway Norway, officially the Kingdom of Norway, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. The remote Arctic island of Jan Mayen and the archipelago of Svalbard also form part of the Kingdom of ...

. Opened in 2010, it bears remarkable resemblance to the Hovenring, sharing for instance its 72 m diameter. The construction is out of concrete rather than steel, and support is more conventional. Considering the Eindhoven ring was designed from 2008 onwards, the designs may very well have been conceived independently of each other. External link
aerial view of the ring on Google maps
A comparison must also be made with the 2011 circular pedestrian overpass of

Lujiazui Lujiazui (, ) is a locality in Shanghai, a peninsula formed by a bend in the Huangpu River. Since the early 1990s, Lujiazui has been developed specifically as a new financial district of Shanghai. The decision to earmark Lujiazui for this purp ...

in the

Pudong Pudong is a list of administrative divisions of Shanghai, district of Shanghai located east of the Huangpu River, Huangpu, the river which flows through central Shanghai. The name ''Pudong'' was originally applied to the Huangpu's east bank (g ...

district of

Shanghai Shanghai, Shanghainese: , Standard Chinese pronunciation: is a direct-administered municipality and the most populous urban area in China. The city is located on the Chinese shoreline on the southern estuary of the Yangtze River, with the ...

and with a similar overpass from 2012 in

Rzeszów Rzeszów ( , ) is the largest city in southeastern Poland. It is located on both sides of the Wisłok River in the heartland of the Sandomierz Basin. Rzeszów is the capital of the Subcarpathian Voivodeship and the county seat, seat of Rzeszów C ...

Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...

Gallery

File:Hovenring-full-night.jpg, Full view of Hovenring at night File:Hovenring-night-shot.jpg, Side view of Hovenring at night File:Hoven-ring-up-close.jpg, Hovenring at night up close

References

{{coord, 51, 26, 0.18, N, 5, 25, 9.49, E, display=title, type:landmark_region:NL Civil engineering Cable-stayed bridges in the Netherlands Cyclist bridges in the Netherlands Steel bridges in the Netherlands Bridges in North Brabant Towers in North Brabant Buildings and structures in Eindhoven Transport in Eindhoven