The Future

 

INTRODUCTION

Severn River Crossing Plc will shortly be handing the crossings back to the Government. We will be updating this webpage with information on how the handover is progressing and what it will mean to the users of the crossings.  We will also be bringing you other information on the crossings past and present.

 

END OF CONCESSION

The term "End of Concession" is used to describe the point in time when Severn River Crossing Plc will be handing the bridges back to the Government.  

 

Types of bridge

SUSPENSION BRIDGE

A bridge in which the weight of the deck is supported by hanger cables suspended from main cables that run between towers and are secured in anchorages at each end.

 

 
 

 

CABLE STAYED BRIDGE

A bridge in which the weight of the deck is supported by a number of cables running directly to the tower

 

 

 

M4 SECOND SEVERN CROSSING

 

Interesting Facts

The "Second Severn Crossing" is actually three Bridges joined together to form a crossing

  • Avon Viaduct     -    Links the English abutment to the Shoots Bridge at Severn Beach.
  • The Shoots Bridge    -    A cable stayed bridge spanning the main shipping channel.
  • Gwent Viaduct     -    Links the Shoots Bridge to the welsh abutment at Caldicot.The Severn Crossing forms part of the M4 motorway which carries traffic between London and South Wales.

The Crossing was opened on the 5th June 1996 by HRH The Prince of Wales and won that year's British Constructors Supreme Award and the Concrete Society's overall winner award.

The Crossing spans the River Severn where winds in excess of 80 mph can create waves up to 2.5 m tall.  It is the longest crossing in the UK.  The crossing has integrated wind shielding to protect the traffic from the strong winds
 

Statistics

The Shoots Bridge

  • Main Span    465 metres
  • Height of Pylons    137 metres above ordinance datum
  • Cable Stays    240 made up of between 19 and 75 strands of high tensile steel wires

       
The Avon Viaduct

  • Type    Twin box girder with 25 spans and a length of 2103 m

 

The Gwent Viaduct    

  • Type    Twin box girder with 24 spans and a length of 2077 m

 

The Crossing

  • Total Length    5168 metres
  • Weight of Steel reinforcing    50,000 tonnes
  • Volume of concrete    450,000 cu m.

 

 

 

M48 SEVERN CROSSING

 

Interesting Facts

The “Severn Bridge” is actually four Bridges joined together to form a Crossing

  • Aust Viaduct     -    Links the cliff at Aust with the main suspension Bridge.
  • The Severn Suspension Bridge    -    Crosses the River Severn and  was the seventh longest span in the world when it was constructed.  It was the first Bridge to be designed in a wind tunnel ensuring stability in all weathers. 
  • Beachley Viaduct     -    Links the Suspension Bridge with the Wye Bridge and is situated on the Beachley Peninsular.
  • The Wye Bridge    -    Is a Cable Stayed Bridge and completes the link between England and Wales by spanning the River Wye.

 

The Severn Crossing forms part of the M48 motorway which links to the M4, carrying traffic between London and South East Wales and the Forest of  Dean area. 

The Crossing was opened on the 8th September 1966 by Her Majesty Queen Elizabeth II.  

The Crossing spans the River Severn which has the second largest tidal range in the world - almost 15 metres

Statistics

The Suspension Bridge

  • Main Span    987 metres
  • Height of Towers    136 metres above ordinance datum
  • Main Cable    8,360 individual galvanised steel wires laid parallel to each other and formed into a 500mm diameter cable.
  • Deck Boxes    Pre-fabricated streamlined hollow steel sections constructed in Fairfield Shipyard in Chepstow.

 

The Wye Bridge

  • Type    Cable Stayed Girder Bridge
  • Main Span    235 metres
  • Height of Towers    38 metres above road level

 

The Crossing

  • Total Length    2993 metres
  • Weight of Steel    25,000 tonnes
  • Amount of concrete    106,000 cu m.

 

 

TOLL PLAZAS

 

                                   M4 ROGIET

 

 

 

                                        M48 AUST

Interesting Facts
 

There are two toll plazas, one in Wales at Rogiet covering the M4 Second Severn Crossing and one in England at Aust covering the M48 Severn Bridge

  • Rogiet Toll Plaza    -    Has 13 lanes
  • Aust Toll Plaza     -    Has 8 lanes

 

Tolls are collected from vehicles travelling westbound only, except for motorcycles that cross for free.
 

The Severn Bridge has a cycle track and footpath on the outer edges of the bridge deck.  These allow pedal cycles, mopeds and pedestrians to cross between England and Wales

Approximately 75% of motorists using the crossings travel over the Second Severn Crossing.  The remaining 25% use the Severn Bridge

The Severn TAG is an Automatic Vehicle Identification System, which is ideal for regulars and allows you to travel Westbound across the M48 Severn Bridge and M4 Second Severn Crossing without stopping to manually pay a toll charge

Statistics
M4 Rogiet Toll Plaza

  • Number of vehicles daily    30,000          
  • Number of vehicles per year    11,000,000   
  • Total number of bridge crossings (In both directions) per year    22,000,000   

 

M48 Aust Toll Plaza

  • Number of vehicle daily    15,000         
  • Number of vehicles per year    3,500,000   
  • Total number of bridge crossings (In both directions) per year    7,000,000    

 

Currently, at peak times, over 5,000 vehicles pass through the plazas every hour

 

The number of vehicles crossing the bridges varies from day to day and year to year.  The above figures are an average approximation and should not be taken to indicate the exact numbers currently using the crossings.