M4 Motorway arup
The Ministry for Economic Development and Transport’s “2004
Transport Review” detailed the Welsh Assembly Government’s
vision for Wales. Included was a new dual three-lane motor-
way 15 miles long linking Junction 23A at Magor and Junction
29 at Castleton. Major challenges of the new M4 road include
the Usk river crossing, which requires shipping navigation
clearances of 25 meters at Newport docks and 27 meters
over the river, the accommodation of three railway lines and
dock infrastructure, environmental constraints, and a tightly
curved and heavily skewed viaduct alignment.
Using MicroStation and InRoads, Arup has multiuser access
to geometry data and can navigate all elements. It can create
all of its 3D elements such as structures, barriers, and curbs,
control visibility, and check solutions for safety within full 3D
with horizontal and vertical curves.
San Francisco — Oakland Bay Bridge East Span california dot
The roadway connecting the skyway section to the existing
freeway lanes west of the Bay Bridge Toll Plaza on San
Francisco’s Oakland Bay Bridge is called the Oakland
Touchdown. Work involves the building of two roadway
sections and a new electrical substation, in addition to
extensive relocation of underground utilities. At $1.04 billion,
it is the largest construction contract ever awarded by the
California Department of Transportation (CALTRANS).
Using MicroStation, InRoads, and other Bentley software,
groups of engineers can work remotely and access central
project trees for design review and modification. During
construction, all vertical and horizontal clearances were
verified using 3D tools. CALTRANS had the ability to perform
a high degree of integrated design locally and remotely
across the network, saving about $100,000 and 100 weeks.