Specification
Public Vehicular Level Crossings
SECTION 231
Combined
Permanent Way
and surfacing
system layout plan
PUBLIC VEHICULAR LEVEL CROSSINGS
1
Where not provided by Railtrack, a combined Permanent Way and
surfacing system layout plan shall be provided by the Contractor for
acceptance by the Employer's Representative, prior to commencing
works associated with the Permanent Way or level crossing
surfacing system. The combined Permanent Way and surfacing
system layout plan shall detail the following:
(i)
Schematic line diagram (Scale 1:100) detailing the existing
Permanent Way layout including rail joints, exact extent of
timber/concrete sleepers with centre-lines of sleepers
shown where a change of material occurs, surface cable
routes, track equipment and outline of existing level
crossing surfacing system.
Dimensions between all rail joint centre-lines shall be
shown to the nearest millimetre.
Dimensions between rails of adjacent tracks shall be shown,
back edge to back edge at 5.0 metre intervals.
Cross-check dimensions shall be shown at both ends of
survey connecting cess and six foot rails together.
Dimensions shown along any given rail shall numerically
correlate with any other given rail.
Individual crossing surfacing components shall be detailed.
The rails shall be shown a minimum 65 metres in both
directions for all tracks from the centre-line of the level
crossing surfacing system.
(ii)
Schematic line diagram (Scale 1:100) detailing the proposed
Permanent Way layout including rail joints, exact extent of
timber or concrete sleepers with centre-lines of sleepers
shown where a change of material occurs, surface cable
routes, and outline of level crossing surfacing system.
Schematic line diagram shall cover the same overall length
of track as specified (i) above.
Dimensions between all joints, existing or new, shall be
shown to the nearest millimetre.
Dimensions between rails of adjacent tracks shall be shown
back edge to back edge, at 5.0 metre intervals. Overall
dimensions shall be shown either end of a track to be
renewed or rerailed, linking existing joints with the precise
location of where new joints are to be positioned.
Existing Permanent Way and proposed alterations to the
same shall be shown on the drawing.
Specification
Public Vehicular Level Crossings
(iii)
Schematic line diagrams (Scale 1:50) showing in detail a plan
view of the level crossing surfacing system arrangements.
The plan view shall detail the following:
(a)
outline of individual sleepers,
(b)
individual components of level crossing surfacing
system,
(c)
running and back edges of all rails,
(d)
nearest rail joints (2 per rail) either side of level
crossing surfacing system components,
(e)
centre line of carriageway with respect to
surfacing system components, complete with
setting out details for centre-line,
The plan-view shall be fully dimensioned with respect to rail joints,
sleepers and surfacing system components, and shall include a
materials list detailing Permanent Way and surfacing system
requirements.
(231.001)
Road vertical
profile
Tolerances for
setting out of level
crossing works
2
3
Where not provided by Railtrack, a longitudinal section of the road,
both over and either side of the level crossing shall be provided by
the Contractor for acceptance by the Employer's Representative.
The longitudinal section shall be produced to the scales 1:100
horizontal and 1:10 vertical, and shall include the following:
(i)
a continuous vertical section of the carriageway centre-line,
extending 40.0 metres either side of the level crossing
commencing from the outside cess rails (2 No zero
chainages). The overall length of the longitudinal section
will need to be increased if an even gradient is not evident
10.0 metres either side of the 40.0 metre chainages. Such
an extension shall continue until a minimum 20.0 metre
even gradient is obtained beyond the 40.0 metre chainage,
or unless otherwise terminated by the Employer's
Representative.
(ii)
spot levels taken at 1000 mm intervals along the centreline, commencing at the outside cess rails (zero chainages),
(iii)
the overall plan dimension between zero and dimensions
along the same line to intermediate rails, with spot levels at
these intermediate rail points.
(231.002)
Foundations for barrier equipment, flashing road signals, camera
columns and lighting columns shall be installed to the co-ordinates
specified on the AFIGP to a tolerance of ± 20 mm of the specified
co-ordinates.
(231.003)
Specification
Public Vehicular Level Crossings
Partial renewal of
level crossing
surfacing system
4
Where specified on the AFIGP or combined Permanent Way and
surfacing system layout plan, level crossing surfacing system
components, shown as defective, shall be replaced with products of
similar dimension, material and construction and compatible with
the existing Permanent Way.
Where specified on the AFIGP or combined Permanent Way and
surfacing system layout plan, extensions to the existing level crossing
surfacing shall be carried out with products of similar dimension,
material and construction to those currently in use.
(231.004)
Complete renewal
of level crossing
surfacing system
5
Where specified on the AFIGP or combined Permanent Way and
surfacing system layout plan, the existing level crossing surfacing
system shall be removed and replaced with a proprietary level
crossing surfacing system in accordance with Clause 231.006,
specifically designed for use at the location.
(231.005)
Level crossing
surfacing system
6
Level crossing surfacing systems shall be in accordance with
Railtrack Line Specification RT/CE/S/040.
(231.006)
Minimum run-off
for level crossing
surfacing system
7
The level crossing surfacing system shall be installed to provide a
surface 500 mm beyond the outside edge of any lining designating
the back-edge of the footpath. This dimension is measured at rightangles to the alignment of the adjacent footpath.
(231.007)
Level working
surfaces around
crossing
equipment
8
The area between the level crossing surfacing system and crossing
equipment shall be brought up to or reduced as necessary to 80 mm
below the level of the top of the barrier foundation for any given
corner of the level crossing to provide a horizontal finished working
surface around the crossing equipment.
Level working surfaces shall be provided for a minimum of
1.0 metre around all level crossing barrier foundations, local control
units, emergency manning cabin and toilet facilities. Similar level
working surfaces shall be provided around the REB pertaining to the
level crossing, where not provided as an integral part of the REB
foundation.
Areas requiring concrete, flexible or ballast level working surfaces
shall be or specified on the AFIGP.
Flexible and ballast level working surfaces shall be retained with
250 mm x 50 mm x 900 mm concrete pin-kerbing, founded and
haunched with concrete STI mix in accordance with Section 85:
Concrete for Ancillary Purposes.
(231.008)
Transition kerbs
adjacent to level
crossing
equipment
9
Transition kerbs shall be positioned with their lowest finished level
directly below the line of any protective barriers (skirted and
unskirted) or gates extending over the carriageway.
(231.009)
Specification
Public Vehicular Level Crossings
Undertrack
crossings (UTX)
10
UTX(s) required as part of the level crossing works shall be
installed at the locations shown on the AFIGP. UTX(s) shall be
installed and constructed in accordance with Level Crossing
Standard Drawing No. RT/CED/600/2 and Section 190: External
Service Ducts.
(231.010)
Under-road
crossings (URX)
11
URX(s) required as part of the level crossing works shall be
installed at the locations shown on the AFIGP. URX(s) shall be
installed and constructed in accordance with Level Crossing
Standard Drawing No. RT/CED/600/1 and Section 190: External
Service Ducts.
(231.011)
Alterations to
existing turning
chambers
12
Where shown on the AFIGP, turning chambers at the level crossing
requiring alteration shall be increased in size and depth to
accommodate increased ducting or outlet requirements, as specified
on the AFIGP.
Any such alterations to existing turning chambers shall be carried
out in accordance with Level Crossing Standard Drawing Nos.
RT/CED/600/1 or RT/CED/600/2 as applicable.
(231.012)
Barrier
foundations
13
The location of the level crossing barrier foundations shall be as
shown on the AFIGP. Mark II barrier foundations shall be
constructed in accordance with Level Crossing Standard Drawing
No. RT/CED/600/3.
Bases for other
barrier types
Where Mark II barriers are not provided, full design details of the
proposed barrier foundations with calculations and design and
design check certificate based on the model in Appendix C, shall be
submitted to the Employer's Representative.
Use of existing
bases
Where renewal of equipment (other than like-for-like renewal) is
specified on the AFIGP and existing concrete barrier foundations
are to be utilised, full design details of any proposed alterations to
the existing barrier foundations shall be supplied to the Employer's
Representative.
(231.013)
Base for
relocatable
equipment room
(REB)
14
The location of the REB base at the level crossing shall be as shown
on the AFIGP. The REB base shall be constructed in accordance
with the requirements applicable to the designated REB type
assigned to the level crossing as detailed on Level Crossing Standard
Drawing No. RT/CED/600/15.
(231.014)
Specification
Public Vehicular Level Crossings
Positioning of
equipment
supports on
foundations
15
All necessary arrangements shall be made by the Contractor for the
delivery of the supports to equipment specified on the AFIGP for
the level crossing and for erection of such supports on the relevant
foundation.
Level crossing equipment supports shall be fixed to the relevant
foundation by a proprietary fixing system recommended by the
equipment manufacturers and as specified in the relevant Level
Crossing Standard Drawing.
(231.015)
Rail datum marker
16
When specified on the AFIGP, a rail datum marker shall be installed
in accordance with Level Crossing Standard Drawing
No. RT/CED/600/10.
(231.016)
Base(s) for posts
for flashing road
signals
17
Concrete bases for posts supporting flashing road signals shall be
provided at the level crossing at the locations shown on the AFIGP.
Bases shall be constructed in accordance with Level Crossing
Standard Drawing No. RT/CED/600/14.
(231.017)
CCTV column
support foundation
18
The location of the concrete base to support the closed circuit
television (CCTV) equipment shall be located and is shown on the
AFIGP, and shall be constructed as with Level Crossing Standard
Drawing No. RT/CED/600/18.
(231.018)
Lighting column
foundation(s)
19
Concrete base(s) supporting lighting column(s) at the level crossing
shall be located shown on the AFIGP.
The base(s) to the lighting column shall be constructed in
accordance with the requirements applicable to the designated
height of column specified on the AFIGP, and as detailed on Level
Crossing Standard Drawing No. RT/CED/600/19.
(231.019)
Ducted
connections
between crossing
equipment and
turning chambers
20
Buried ducting routes for all cable types on Site shall be constructed
where specified on the AFIGP.
The minimum diameter and duct type shall be as specified in
Section 190: External Service Ducts applicable to cable type. The
minimum depth to top of pipe shall be as detailed in Section 190:
External Service Ducts, applicable to type of buried duct route.
The following items of infrastructure at the level crossing will be
powered and controlled by cables installed in buried ducting routes:
(i)
(ii)
(iii)
(iv)
(v)
(vi)
(vii)
(viii)
(ix)
barrier mechanisms,
flashing road signals (wig-wags),
local control unit,
emergency manning cabin,
telephones,
toilet facilities,
connections, other than those provided by surface
troughing routes, to REB,
CCTV equipment,
lighting columns,
Specification
Public Vehicular Level Crossings
(x)
(xi)
illuminated rail signals,
illuminated road signals.
Ducts shall also be provided to permit interconnection with a public
telecommunications service operator and for power supply.
Openings shall be created in all new and existing turning chambers
to accommodate the buried ducting routes, as detailed on the
AFIGP.
(231.020)
Power supply
cubicle foundation
21
The power supply cubicle for the level crossing and the associated
foundation shall be located and aligned as shown on the AFIGP. The
foundation including duct entry requirements shall be in accordance
with the recommendations of the power supply cubicle
manufacturer.
Concrete for the cubicle foundation shall be minimum concrete mix
ST5 in accordance with Section 85: Concrete for Ancillary Purposes.
(231.021)
Concrete
footpaths
22
The location of concrete footpaths in the vicinity of the level
crossing shall be as shown on the AFIGP. Ground levels at the level
crossing shall be adjusted to ensure concrete footpaths comply with
the levels specified in Clause 231.008.
Concrete footpaths shall be minimum 1000 mm wide.
Concrete to footpaths shall be unreinforced concrete mix ST4 in
accordance with Section 85: Concrete for Ancillary Purposes to a
depth 100 mm, laid over 100 mm of compacted Type 1 sub-base.
The upper surface shall be brush finished, to provide anti-slip
properties, to a maximum width of 400 mm either side of footpath
centre-line.
(231.022)
Sleeve-rod
assemblies
23
Sleeve-rod assemblies for under-road signalling equipment at level
crossings shall be located as shown on the AFIGP.
Sleeve-rod assemblies shall be manufactured in accordance with
Level Crossing Standard Drawing No. RT/CED/600/17.
(231.023)
Approach surface
of carriageway at
level crossing
24
Partial or complete reconstruction of the carriageway, either side of
the level crossing surfacing system, shall be in accordance with the
requirements of the Highway or Road Authority as applicable.
Except where specified in Sections 200 - 204: Roads and Pavings, the
specification to be used shall be obtained by the Contractor, and
details advised to the Employer's Representative.
(231.024)
Road studs
25
Road studs shall be located in accordance with the AFIGP. Any
road studs within 20 metres of the nearest running edge of rail shall
be a non-metallic construction.
(231.025)
Specification
Public Vehicular Level Crossings
Vehicular
deterrents
Tactile surfacing
26
27
Vehicular deterrents shall be one of the following types provided at
the locations shown on the AFIGP:
(i)
concrete bollards, minimum height 1000 mm, spaced at
1200 mm intervals,
(ii)
a random pattern of close-set 150 mm stone cobbles fixed
with two thirds their depth set in concrete standard mix
ST4 in accordance with Section 85: Concrete for Ancillary
Purposes.
(231.026)
Tactile surfacing at level crossings shall be provided at the locations
specified on the AFIGP.
Tactile surfacing material shall be in accordance with the
requirements of the Highway or Road Authority as applicable.
(231.027)
Direction of
highway drainage
at level crossings
28
Surface water on approach carriageways and footpaths to the level
crossing shall be directed away from the railway and level crossing
surfacing system by provision of adequate cross-falls to the road and
footpath construction and the use of the local drainage network.
Cross-road drains laid back to back against the level crossing
decking system may only be used when agreed by the Employer's
Representative.
(231.028)
Demolition of
redundant
structures
29
Structures requiring demolition and removal from the vicinity of the
level crossing are as shown on the AFIGP.
Demolition shall be in accordance with Section 40: Demolition.
(231.029)
Road and rail signs
30
Road and rail signs applicable to the level crossing shall be located as
shown on the AFIGP.
The centre of rail signs shall be 2500 mm above adjacent rail level,
and 2100 mm from the nearest running edge measured
perpendicularly to the tracks.
Where a hedge verge or fence to the road exists, but no footpath,
road signs shall be positioned to provide a 1200 mm minimum
height from ground level to lowest horizontal edge of sign, and a
1000 mm minimum clearance from edge of road to nearest vertical
edge of sign.
Where the verge width will permit, the horizontal clearance shall
be 1500 mm.
Where a hedge verge or fence to the road exists, with a footpath,
road signs shall be positioned to provide a minimum 1200 mm
height from ground level to lowest horizontal edge of sign, provided
that the sign does not infringe over the footpath. Where the sign
infringes over the footpath, the minimum height shall be increased
to 2060 mm.
Specification
Public Vehicular Level Crossings
The minimum clearance from edge of footpath (nearest verge) to
nearest vertical edge of sign shall be 500 mm.
All road signs, utilising posts, shall be positioned to give a horizontal
angle of 100 degrees between the front face of sign and adjacent
kerb-line, as viewed from approaching nearside direction of travel.
All road and rail signs applicable to the level crossing shall be
supported and fixed in accordance with Level Crossing Standard
Drawing No: RT/CED/600/9.
(231.030)
Bell gauges
31
Bell gauges shall be located in accordance with the AFIGP, and shall
be constructed in accordance with Level Crossing Standard Drawing
No. RT/CED/600/16.
(231.031)
Internally
illuminated
highway signs
32
The location of internally illuminated highway signs shall be shown
on the AFIGP. The specification for the manufacture, installation
and provision of power supply for the highway signs shall be in
accordance with the requirements of the Highway or Road
Authority as applicable.
(231.032)
Cattle-cumtrespass guards
33
Cattle-cum trespass guards shall be provided at the locations shown
on the AFIGP. Cattle-cum-trespass guards shall be constructed and
installed in accordance with Level Crossing Standard Drawing
No. RT/CED/600/8
(231.033)
Cattle grids
34
Cattle grids shall be provided in the highway at the locations shown
on the AFIGP.
Cattle-grids shall be constructed and installed in accordance with
Level Crossing Standard Drawing No. RT/CED/600/20.
(231.034)
Road marking
35
Road marking at the level crossing shall be provided in accordance
with the AFIGP, and shall comply with the Traffic Signs, Regulations
and General Directions, 1994.
(231.035)
Boundary fencing
36
Fencing delineating the boundary between Railtrack's property and
property of adjacent land owners shall be provided at the locations
as shown on the AFIGP. Boundary fencing shall be constructed in
accordance
with
Level
Crossing
Standard
Drawing
Nos. RT/CED/600/4, 5 or 6 as applicable to fence type.
(231.036)
De-mountable
open mesh steel
grid panels
37
De-mountable open mesh steel grid panels to match the fencing
panels adjacent to level crossing barrier shall be provided at the
locations shown on the AFIGP.
Supporting concrete posts, either side of the de-mountable panel,
shall be permanently fixed in position.
Specification
Public Vehicular Level Crossings
The de-mountable panel frame shall be constructed from hardwood
of natural durability or durability with preservative treatment in
accordance with Section 164: Preservative Treatment, to give
minimum life of 25 years. All ironmongery associated with the demountable panel shall be galvanised.
The de-mountable panels shall be capable of being repeatable,
removed and reinstated using hand held tools only and shall be fixed
such that the full depth of both concrete supporting posts lie
between the panel frame and the barrier mechanism.
A clearance, minimum 90 mm, maximum 110 mm shall be provided
between the open mesh steel grid and the nearest moveable
component of the barrier mechanism.
(231.037)
Field gates
38
Field gates shall be provided at the locations shown on the AFIGP.
Field gates shall be constructed and installed in accordance with
Level Crossing Standard Drawing No. RT/CED/600/7.
(231.038)
Emergency
manning cabin
39
The Emergency Manning Cabin shall be provided at the location
shown on the AFIGP. The Emergency Manning Cabin shall be
constructed in accordance with Level Crossing Standard Drawing
No. RT/CED/600/21.
A concrete foundation shall be provided for the Emergency Manning
Cabin. Proposed foundation details shall be provided to the
Employer's Representative for acceptance.
(231.039)
Toilet facilities
40
Toilet facilities shall be provided at the location shown on the
AFIGP.
Permanent toilet facilities for one person shall be provided at the
level crossing in accordance with the minimum requirements of
Health and Safety at Work Regulations. Details of the proposed
toilet facilities and the method of installation on Site shall be
submitted to the Employer's Representative for approval prior to
installation.
The toilet facilities shall be provided with connections to mains
electricity, water and drainage.
The toilet facilities shall be provided with a water tank capable of
holding water (chemically treated) for a minimum 30 flushes, battery
operated electrical system, and a connection to a soakaway
constructed in accordance with Section 180 - 182: Building and
Structure Drainage.
(231.040)
Specification
Public Vehicular Level Crossings
Temporary
barriers
41
Hand controlled and operated, cantilevered, temporary raising and
lowering barriers shall be provided as necessary both sides of the
level crossing(s) by the Contractor.
Temporary barriers shall span the full width of the carriageway from
both near-side approaches to the level crossing.
The location and operation of the temporary barriers during the
construction of the level crossing shall be agreed between the
Employer's Representative and the Contractor.
Temporary barrier arms shall be constructed using steel ‘scaffold
poles’, painted at 600 mm intervals with alternate red and white
strips. Battery operated red lights shall be positioned on the arms
at 1200 mm centres.
The temporary barriers shall be constructed with a locking
mechanism to lock the barrier arms in both raised and lowered arm
positions. The locking mechanism (utilising padlocks) shall be
installed at the counterweight end of each temporary barrier.
The temporary barriers shall be operated by the Contractor on a
continuous basis for 24 hours per day throughout their operation
and use.
(231.041)
Temporary traffic
signals
42
Portable temporary traffic signals may be used in the vicinity of level
crossings during works involving reconstruction of the highway
adjacent to the crossing subject to the following conditions:
(i)
any proposed use of temporary traffic lights shall be
included in the detailed method statement for the level
crossing works, and shall be agreed prior to the
commencement of the level crossing works,
(ii)
temporary traffic signals shall not be used at works which
straddle a crossing nor to control road traffic within
50.0 metres of level crossings equipped with operational
flashing road signals,
(iii)
temporary traffic signals used at works near a level
crossing shall be manually controlled so that the operator
can maintain the all red period for sufficient length of time
to allow the train(s) to pass,
(iv)
even though temporary traffic signals may be used a
distance of 50.0 metres or more from the level crossing,
where considered by the Employer's Representative that
road traffic may block back to the level crossing,
STOP/GO signs shall be provided and used by the
Contractor in lieu of temporary traffic lights. In such
instances, if there is a danger of blocking back, the location
of the traffic control shall be immediately moved to a point
on the opposite side of the crossing from the works so
that traffic can be stopped before reaching the crossing,
Specification
Public Vehicular Level Crossings
(v)
regardless of the method of traffic control used, the level
crossing's own road signals are clearly visible to
approaching vehicle drivers.
(231.042)
Use of STOP/GO
signs
43
Further to Clause 231.042, for works near level crossings, traffic
control shall be by means of STOP/GO signs. Road traffic shall be
controlled to prevent stationary traffic on the level crossing.
(231.043)
Confirmation of
clearances to a.c.
electrification
overhead line
equipment
44
Prior to physical installation of raising/lowering barrier arms,
confirmation shall be provided to the Employer's Representative
that the vertical and horizontal clearances between the end-tip of
each barrier arm on site and the nearest a.c. electrification overhead
line equipment are as specified on the AFIGP.
(231.044)
Certification of
completion
construction
45
Following completion of all site works (including snagging lists), and
no less than 48 hours prior to commissioning of the level
crossing(s), the ‘tickboxes’ on the AFIGP shall be completed by the
Contractor for those items of work which lay within the
Contractor's area of responsibility, and a dated Certificate to the
effect that all ticked boxes on the AFIGP (to be listed on the
certificate) have been duly carried out to the satisfaction of the
Employer's Representative shall be provided. The certificate shall be
signed by the Contractor’s nominated responsible Engineer.
(231.045)