Road Inventory

Road Type

Road section is categorised based on the number of lanes as mentioned below
Two lane
Four lane without divided carriageway
Four lane with divided carriageway
Multi-lane without divided carriage way
Multi-lane with divided carriage way

Pavement surface type

Road surface or pavement is the durable surface material laid down on an area intended to sustain vehicular or foot traffic, such as a road or walkway and it is categorised as follows
   
Asphalt / Bituminous Cement Concrete Others    

Pavement Width

Width of the carriage way or the width of the pavement depends on the width of the traffic lane and number of lanes. Width of a traffic lane depends on the width of the vehicle and the clearance.

  1. <3.75 m;
  2. 3.75 m – 5.50 m;
  3. 5.50 m - 7.0 m;
  4. 7.0 m - 9.0 m;
  5. 9.0 m – 14.0 m;
  6. >14.0 m

Shoulder type

A shoulder, often serving as an emergency stopping lane, is a reserved lane by the verge of a road or motorway on the left side. It is categorised based on the type of material used build shoulder as mentioned below:
   
None or no shoulder Paved Gravel Earth  

Shoulder Width

A shoulder, often serving as an emergency stopping lane, is a reserved lane by the verge of a road or motorway on the left side. The width is categorised as

  1. No shoulder;
  2. <1.0 m;
  3. 1.0 m - 2.0 m;
  4. >2.0 m

Side Drain Type

A drain is a small to moderate depression created to channel water. It can be used for drainage, to drain water from low-lying areas, alongside roadways or fields, or to channel water from a more distant source for plant irrigation. It is categorised as follows:

  1. Open unlined;
  2. Open lined;
  3. Covered lined;
  4. No drain;
  5. Drain not needed.

Median Width

The median is the reserved area that separates opposing lanes of traffic on divided roadways, such as divided highways, dual carriageways, freeways, and motorways.

  1. No median;
  2. < 1.0 m;
  3. 1.0 m – 2.5 m;
  4. 2.5 m - 5.0 m;
  5. > 5.0 m.

Cross Section

A cross section is a vertical plane (slice) taken at right angles to the road control line showing the various elements that make up the roads structure. It is normally viewed in the direction of increasing chainage. The cross-section of the roadway should indicate

  1. Cut
  2. Fill
  3. Level

Road Condition
SURFACE CRACKING RAVELLING

POTHOLES

 PAVEMENT DEPRESSIONS

BLEEDING

Cracks are fissures resulting from partial or complete fractures in the pavement seal layer

• Loss of area of the surfacing.

• Removal of aggregates in longitudinal strips.

• Pavement binder appears alternatively in thin and thick line on the surface, parallel to road axis.

• Removal of aggregates of a large surface area.

 A steep sided or bowl shaped cavity extending into the layer below the wearing course.  Not associated with softening or distortion of the surrounding pavement Localised area of pavement with elevations lower than the surrounding pavement.  Not confined and may extend across several wheelpaths and have a surface that has not failed Partial or complete embedment of the aggregate into the bituminous binding or localised accumulation of bitumen at road surface, resulting in low texture depth and inadequate tyre-to-stone contact.  Road appears black and shiny

PATCHING

EDGE BREAKS

      
     
Evidence of previous repair to pavement.  Indicates the general condition and aging of the pavement and need for consideration to include in other maintenance programs Cracking and disintegration of the edges of the bituminous pavement      

Roughness

The International Roughness Index (IRI) is the roughness index most commonly obtained from measured longitudinal road profiles. It is calculated using a quarter-car vehicle math model, whose response is accumulated to yield a roughness index with units of slope (in/mi, m/km, etc.)

The longitudinal profile is measured using a ROMDAS two wheelpath Laser Profilometer and Roughness is determined from this profile and reported in International Roughness Index (IRI) in m/km.