Step

Description

Example

1

Enter the task and click on “Events”. The events are used to annotate the Road Condition Events encountered in the task.

2

Click on “Add Event” to start labeling.

3

Select a label to create the event.

4

Once the label is selected, annotate the attributes and duration.

Definitions:

1. Attribute: Label type
2. Duration: Frames that the label type is visible.

Rule

Description

Example

Required labels in ALL frames

1. Road Surface label should always be set and it's required property in all frames.

    1.1. Road Surface = "Asphalt"

- Road Conditions label is also mandatory and should be set on every frame where we have Asphalt.

- Road damage and Tramrails labels should be set only on frames where they exist.

  1.2. Road Surface = "Cobblestone" or "Unpaved"

- No need to annotate Road conditions and Road damage labels

- Tramrails should be annotated if they exist

If a task has 300 frames and from frames 1-150 the RoadSurface is Asphalt and from frames 151-300 the Road Surface is Cobblestone,

Create 2 separate events for Road Surface.

Event 1: Road Surface-> Asphalt->Duration (1-150)

Event 2: Road Surface-> Cobblestone->Duration (151-300)

Conditional labels

The following labels should only be used in events when visible in the task.

Labels:

• Road Damage
• Train Trams

Group Label

Attributes

Value

Road Conditions

Road Surface Types

•  Asphalt (i.e. concrete),
• Cobblestone (i.e. pavements)  
• Unpaved (i.e. gravel).

 Road Conditions

• Dry
• Moist
• Wet
• Snow/Ice
• Dirt

Road Damage

Road cracks. They can be:

• Longitudinal
• Lateral
• Crocodile/alligator
• Sealed cracks.

TramRails.

Tram Rails can be:

• On the ego lane
• To the left/right of the ego lane.

Value

Examples

Description

Asphalt

Most common road material. Normally used on new large roads, like highways.

Cobblestone

Natural building material based on cobble-sized or rectangular quarried stones covering at least 50% of the ego lane.

Unpaved

Unpaved road common in rural areas consisting of crushed stone, sand and fines covering at least 50% of the ego lane.

Value

Examples

Description

Dry

Ego lane road is not covered by water, snow, ice or other substances

Moist

More than 5% and less than 95% of the ego lane road surface is covered with water.

Wet

More than 95% of the ego lane road surface is covered with water.

Snow

More than 25% of the ego lane road surface is covered with snow, slush or ice.

Dirt

More than 25% of the ego lane road surface is covered with dirt.

Value

Examples

Description

LongitudinalCrack

A crack in ego lane that is parallel to the pavements centerline / driving direction.

LateralCrack

A crack in ego lane that is perpendicular to the pavements centerline / driving direction.

CrocodileCrack

A fatigue cracking in ego lane refers to a pattern that resembles the scales on crocodiles/aligator’s skin. The cracks form co-joined, irregular ‘blocks’ that are often four-sided, such as rectangles.

SealedCrack

A filled crack in ego lane to prevent entry of water. Crack filler material is typically some form of rubberized asphalt or sand slurry.

Value

Examples

Description

TramRailsEgoLane

Tramrails are on ego lane.

TramRailsLeftLane

Tramrails are on the left lane next to ego lane.

TramRailsRightLane

Tramrails are on the right lane next to ego lane.

TramRailsEgoLane

&

TramRailsLeftLane

Tramrails are on the ego lane and left lane. Both should be annotated.

Common Error Name

Description

Examples

End Frame Annotation

All events should have a start and end frame annotation.

Make sure that the frames are annotated accurately.

Road Rails are NOT TramRails

Do not confuse Road Rails with Tram Trails.

Road Rails are guards that are alongside the roads.

TramRails are rails on the ground used by Trams to drive by.

Road Rails (Incorrect)

TramRails (Correct)