Checklist for Road Design Deliverables

General

• The QA sheet is signed off by the relevant officials
• The proposed design is in accordance with the applicable design Standards
• Design basis report is prepared and provided. The proposed design complies with it.
• All necessary design assumptions are provided in the design report and drawings.
• All deliverables including drawings, reports, calculations, specifications etc. are submitted together
• Inter-discipline coordination has been done
• All text, dimensions and their sizing are as per applicable drawing and drafting Standards
• All comments from previous review and responses are provided as a part of submission
• Deliverables are updated complying previous comments (if revised deliverable is being submitted)
• Design drawings are prepared as per scope of work, and in accordance with scheme brief, master plan, design management plan etc.
• Project boundary lines are defined and drawn
• Project name, project number and project location are shown
• General notes on drawings include all relevant information
• The ‘North Arrow’ is indicated on the drawings
• The horizontal and vertical graphic scales (if applicable) are shown
• Legends, abbreviations, and symbols are shown in the Title Box or on a separate drawing
• All necessary cross references to other drawings, specifications and other relevant documents are indicated in the ‘Notes’ on drawings
• The existing features are shown as base mapping
• The existing ground contours are shown on roadway design drawings
• The information provided in different deliverables and submitted by different disciplines is consistent with each other and don’t conflict with each other
• The design submission is enough for the construction purpose (in case the design is complete or very near to completion)
• All relevant ‘Typical Standard Details’ are provided
• The design items used in the drawings are the same as in the BOQ tables
• The foreseeable maintenance and operation issues are considered and addressed (as much as reasonably practicable) in the design features
• All departures from Standards are identified and got approved prior to design submission.
• All innovative ideas are reviewed and implemented after assessing the value they are going to add to the project, whole life costing, potential risks and mitigation measures etc.?
• The proposed earthwork including embankments, cuttings, side/batter slopes are based on geotechnical investigation report
• All potential hazards and risks to workers, end users, operators/maintenance teams are identified and captured in the risk register
• All relevant notes are provided along with 'SHE' box in the Title Box. ‘SHE’ box is meant for indicating major hazards relating to health & safety and environments and is part of best practices
• Impacts on environments are assessed carefully and all possible mitigations and sustainable solutions are explored and implemented
• Value management process is followed and is embedded in the design
• Aesthetics of design features (wherever possible) are given due importance
• Relevant stage of ‘Road Safety Audit’ has been carried out and its recommendations are addressed in the design
• All miscellaneous best practices in design and construction are considered and applied in the design deliverables.?

Site Clearance Plans

• The drawings indicate shaded or hatched area(s) for general site clearance
• The areas of different characters e.g., woodland is separately identified on the drawings
• The drawings clearly indicate any area of grassland or woodland, individual trees or shrub required to be preserved e.g., for re-use e.g., for landscaping purpose.
• The mode of disposing of the dismantle materials is explained in the notes
• All disused soil, surface water drains, sewers, cables and ducts together with any bed or haunch or surround within 1 m of formation level are shown to be removed or and over 1 m below formation to be left unless otherwise been indicated and explained
• All existing road markings and road studs (if applicable) on the existing carriageway are identified for removal.
• Any hazardous materials expected to be encountered on site are identified and their safe removal instructed
• The note "contaminated material dispose off-site immediately and will not be stockpiled at site" (if applicable) is provided on drawings
• The designated area for stockpiling surplus material at site is indicated on drawings.

General Layout Plans

• The layout plans include but not limited to, reference lines, edge lines, curve radii, cross falls, channelization, pedestrian and utility crossings, parking areas.
• The swept path analysis is carried out for junctions etc. using appropriate design vehicle
• The visibility requirements on the junctions are as per applicable design Standards
• The lengths of acceleration and deceleration lane, tapers lengths are shown
• The pedestrian’ crossings are provided as per requirements
• The lane widths are adequate considering the types of traffic going to use the facility
• Proper weaving lengths is provided between two successive junctions in compliance with applicable design Standards
• Proper lengths of diverge or merge tapers are provided
• The need of traffic calming is looked into and is provided on low-speed roads and school zones with all relevant traffic signs etc.
• Extra widening is provided on horizontal bends of urban roads

?Fencing Plans

?The types of fencing are broadly categorized as:

• Temporary Fencing (required during construction)
• Permanent Fencing
• ?Permanent fencing has further types shown below. Design for the applicable one/s should be considered:
• Right of Way Fencing (to delineate and separate private property from the road reservation)
• Animal Fencing (to prevent animals from entering the highway reservation. The size and type of fencing is dependent on the type of animal the fencing is intended to control, e.g., camel or goat)
• Acoustic Fencing (required in sensitive locations such as residential areas to lower the traffic noise level. The fence forms a barrier, and the sound is reflected away from the sensitive area)
• Headlight Barriers (implemented at locations where it is desirable to minimize the glare of the headlights of oncoming vehicles, such as at unlit bends on rural roads.)
• Pedestrian Access Fencing (may be required where there are significant numbers of pedestrians such as on commercial streets, outside schools or large sports complexes where crowds may gather. The fencing controls the movement of pedestrian traffic and lowers the risk of a pedestrian accidentally moving onto a live carriageway.)
• Safety Fencing (A safety fence is a longitudinal barrier used to shield motorists from natural or man-made hazards located along a road.)

In all fencing plans:

• The type of fencing is identified/labelled and provided as per requirements of applicable design Standards
• The field gates, posts and stiles are indicated on the drawings

Curbs, Walkways and Paved Areas

• The dropped curbs are specified at all pedestrian and vehicle crossings
• All dropped crossings are specified with the correct upstand
• In the design of curbs and adjacent sidewalks, proper attention is given to the needs of persons with disabilities whose means of mobility are dependent upon wheelchairs and other devices.
• The street intersection with steep-faced curbs doesn’t pose obstacle to persons with disabilities.
• Adequate and reasonable access is provided for sidewalk curb ramps
• All curbs’ details including foundation and hunching is shown
• The edgings/treatment at the rear of the footway is indicated
• The proper width of footways is designed/proposed
• The paved areas are properly designed for surface drainage
• The splitter islands/medians are enough in width for accommodating pedestrian, road signs’ erection etc.
• The footways occasionally overrun by the vehicles are designed properly and indicated
• Suitable cross fall as per applicable design Standards is provided on walkways
• Walkways are free of any hazards to the pedestrians
• The tactile paving and other relevant features are provided on pedestrian crossings for people with special needs.

Pavement

• Pavement design report is prepared showing design Standards/criteria and, assumptions used along with detailed calculations, etc.
• Pavement is basically designed on the basis of CBR values of native soils and cumulative traffic volume over the design period in terms of ESAL
• Typical cross sections in embankment and cutting are provided
• High friction surfacing is provided to provide adequate skid resistance on sensitive locations e.g., pedestrian crossings, proximity to junctions etc.
• Adequate cross fall is provided for smooth surface drainage
• Appropriate sub surface drainage system is integrated with the pavement
• The depth of existing subbase is kept in view in the widening schemes and the level of subbase for the widened section is kept lower than the one for existing pavement in order to ensure proper sub surface drainage.
• Typical cross section details of widening scheme and tie-in details between the existing and new pavement are provided.
• The scope of polymer modified bituminous mix, warm mix (instead of hot mix), low carbon concrete etc. is considered and appropriately incorporated in the design targeting sustainable development
• Preferably super pave bituminous mix is proposed instead of Marshall mix design
• In the typical cross sections, the prime coat, tack coat, fog seal (if applicable) are considered and indicated on the relevant interfaces of pavement structure layers
• Performance based design is preferred particularly for designing subbase course. It is meant for re-using the dismantled/demolished materials and ensuring sustainable development.

?Traffic Signs

• The positioning of signs is appropriate
• All signs are located so as to be visible and don’t provide obstruction to road/footway users
• All signs requiring illumination are designed appropriately
• The requirements for reflectorization are included
• All signs correctly are referenced and scheduled in the sign schedule
• All warning signs are provided on both sides of the road (in case of multi lane roads)
• Lateral clearance of signs from the adjoining carriageway is in accordance with the applicable design Standards
• Mounting height of signs is as per applicable design Standards
• All warning signs are provided in English & Arabic
• The speed limit signs are provided along with repeaters and ‘roundels’ on the road surface
• The speed limits signs are provided at locations where speed limits are changed
• The ‘Lane Configuration Signs’ are provided ahead of junctions to forewarn the motorists for adopting lane discipline
• The cluttering of signs is tried to be done away with
• The ADS signs are agreed with the authorities and designed properly
• The ADS signs are positioned on the suitable locations depending on the speed of road
• The foundations and posts of signs are designed properly
• The sizes of signs, texts are as per speed limits of the road
• The tourists’ signs are considered after consultation with the relevant stakeholders.?

Road Makings

• All lanes’ arrow markings are in line with the traffic movement i.e., traffic model/assessment
• Widths and pattern of longitudinal lines are according to applicable design Standards
• The type of markings is proposed keeping in view the approaching hazards or obstruction
• Road delineators are provided complying with the applicable design Standards
• Appropriate road studs are provided particularly on sensitive locations
• The extra lane width (wherever required and proposed) is hatched off
• The hazard lane markings are provided on curves and near the junctions
• The pedestrian crossings are provided at desired lines with all provision for people with special needs
• Provide overhead signs, if required as per applicable design Standards
• Where overhead signs are necessary, sufficient headroom is provided
• The ‘chevron’ signs are provided on the horizontal curves
• The visibility of signs is ensured as per requirements of applicable design Standards.

Profiles/Setting Out Plans

• The vertical profiles are designed keeping in view existing gate levels (if applicable), drainage requirements and levels of connecting roads
• ‘Desirable Minimum Stopping Sight Distance’ (SSD) is provided
• ‘Full Overtaking Stopping Sight Distance’ (FOSD) or PSD is provided on single carriageways
• Super-elevation is provided on horizontal curve on high-speed roads
• The correct length of super-elevation changeover has been applied for each change of super-elevation
• Super-elevation has been correctly designed/ located to avoid flat spots in the design
• The design of profile provides minimum tangent length before and after intersections
• The minimum desirable longitudinal gradient is provided for surface drainage
• Grading plan of intersections provided
• Plans and profiles are provided on the same sheet
• The curve length, “K” value and design speed for vertical curves are labelled
• Cross falls/camber are provided as per applicable design Standards
• Appropriate super elevation and transition curves are provided on horizontal curves, if applicable
• The profiles indicate existing as well as proposed levels
• Minimum vertical clearances are provided on the locations of over bridges or rail tracks
• On straight or nearly straight sections of road, hidden dips are avoided
• Sag curves meet the headlight sight distance requirements
• All tie-ins match with the existing layout
• All coordinates are provided on all important points e.g., on junctions etc.
• Roadway cross sections are provided at every 50 m intervals
• The drainage requirements are considered in designing valley curves
• The vertical and horizontal aspects are integrated
• The side slopes/cross-falls are provided to ensure proper drainage
• Proper tie-ins are provided with the adjoining roads
• Balancing of cut and fill (as much as possible) is tried in the design of road profiles.

Safety Barriers

• The need for safety barriers to protect road users (especially on high-speed roads) from signs, gantries, abutments, steep embankments or water hazards is identified and proposed
• Passively safe signs posts, street lighting columns etc. are considered (which doesn’t need provision of safety barrier)
• The barriers have the correct end terminals
• The barriers have adequate lengths
• The safety barriers don’t obstruct visibility of road users
• The hazards posed by the proposed safety barriers are assessed/taken into account.

Grading and Drainage Plans

• Adequate protection from offsite runoff is provided
• Grading and drainage shall be designed allowing safe passage to 100-yr flood through proposed development
• The existing drainage pattern on the plan is shown
• The existing and proposed contours are labelled and shown on the plans
• The existing grades along entire perimeter of proposed development are shown.
• The ultimate project drainage outfall is shown
• The erosion protection at outfall is indicated
• The drainage details such as ditch and swale shapes, invert elevations, alignment, and location dimensions are shown
• The channels in both plan and profile view, flow line elevation, slope, top of ditch elevation is shown at every 50m interval.
• The hydraulic grade line and freeboard are shown
• The erosion protection such as grouted riprap or concrete lining is considered
• if channel side slope steeper than 4:1, channel lining is considered.
• The depth of water table is considered while designing detention/retention ponds
• Depth of detention/retention pond does not exceed 1.0 m.
• Storm water retention time does not exceed 36 hrs.
• Minimum size of storm water main considered is 500 mm
• Minimum size of storm water lateral pipe is considered 300 mm
• Check minimum cover on all storm water pipes. If cover is less than 1.2m (applicable only to uPVC or GRP pipes), consider concrete encasement or any other type of protection.
• All storm water pipes are shown in plan and profile view with all crossing utilities.
• Minimum separation of 500 mm is provided with all crossing utilities.
• The pipe size, type, class, gage, length, and inverts are shown on plans.
• The MH is proposed where storm pipe alignment or storm drainpipe size is changing.
• Maintain maximum spacing of MH and catch basins is according to applicable design Standards.
• Adequate number of cross sections through site are shown in order to clarify the design intent.
• Provide a Drainage Area Map that delineates all drainage areas that impact the site, on-site and off-site.?
• All necessary drainage features are identified
• The drainage facilities (e.g., gully spacing, flat spots, crossfall, ditches) are adequate
• Features such as gullies don’t obstruct cycle routes or footpaths
• The desirable minimum earth cover is provided to the pipes
• The minimum clearance from the other utilities is provided
• Adequate design of box culverts, headwalls, wing walls is provided
• All low points are identified and provided adequate drainage system
• The manhole covers are flush to finish ground avoiding pedestrian/cyclist obstruction?
• The ultimate outfall locations are identified
• The Hydraulic model and design calculations are prepared and provided
• The debris and clogging of storm drain inlet are adequately addressed
• The flood inundation of storm drain system is appropriately analysed
• The pollution control measures are provided
• For catchment area less than 1 square kilometer, the rational method is used.?For catchment area larger than 1 square kilometer, the hydrograph method is used