Exploring Elements Roadway Data in GIS

Pavement Marking Condition Assessment

Pavement marking roadway features have a quality_score value that scores the marking visibility using subjective criteria. Markings are scored from 1 to 4 based on visibility of defects.

Score	Example	Description
Good: 4		Good. No visible signs of defects.
Acceptable: 3		Acceptable. Minimal signs of defects.
Fair: 2		Fair. Pronounced signs of defects that affect the function of the marking.
Poor: 1		Poor. Pronounced signs of defects that significantly affect the function of the marking.

Using this data, pavement markings can be quickly filtered by category and quality_score to identify markings for further review.

Crosswalk pavement markings with quality_score 1 or 2.

Roadway Inventories for Bike and Pedestrian Facilities

Crosswalks - locations, conditions, and crossing distances of standard and high-visibility crossings at intersections and midblock.
Bicycle lanes - locations of bicycle-related symbols, words, and green colored pavement to update maps.
Infrastructure - locations of ADA detectable curb mats (truncated dome) and pedestrian refuge islands.

Roadway Inventories for FWHA Model Inventory of Roadway Elements (MIRE) Reporting

AI-detected roadway features and pavement markings can be used in geospatial queries and processing routines to populate intersection, approach, and road segment GIS features with several attributes useful for Federal Highway Administration (FHWA) Model Inventory of Roadway Elements (MIRE) inventories and reporting. The table below lists MIRE data elements that can be populated using Elements Roadways data.

MIRE Data Element	MIRE No.	MIRE Data Type	Data Attributes
Presence/Absence of Bicycle Facilities	41	Roadway Segment	Presence/Absence: Marked bicycle lane
School Zone Indicator	99	Roadway Segment	Indication of school zone. Yes/No
Type of Intersection/Junction	111	At-Grade Intersection/Junctions	Presence/Absence: Roadway/pedestrian crossing (e.g., midblock crossing, pedestrian path or trail)
Intersection/Junction Number of Legs	115	At-Grade Intersection/Junctions	Numeric
Intersection/Junction Geometry	116	At-Grade Intersection/Junctions	Presence/Absence: Roundabout Midblock pedestrian crossing
Intersection/Junction Traffic Control ^FDE	121	At-Grade Intersection/Junctions	Uncontrolled Two-way stop All-way stop Yield Railroad crossing, stop line controlled Railroad crossing, crossbucks only
Circular Intersection - Bicycle Facility	127	At-Grade Intersection/Junctions	Presence of bicycle facility Yes/No
Number of Approach Through Lanes	134	At-Grade Intersection/Junctions	Numeric
Number of Exclusive Left-Turn Lanes	136	Intersection Leg (each approach)	Numeric
Number of Exclusive Right-Turn Lanes	140	Intersection Leg (each approach)	Numeric
Approach Traffic Control	144	Intersection Leg (each approach)	Uncontrolled Stop line Yield line Railroad crossing, stop-line controlled Railroad crossing, crossbucks only
Crosswalk Presence/Type	147	Intersection Leg (each approach)	Unmarked crosswalk Marked crosswalk Marked crosswalk with refuge island
Circular Intersection - Presence/Type of Exclusive Right-Turn Lane	160	Intersection Leg (each approach)	None Exclusive right turn bypass/slip lane
Circular Intersection - Pedestrian Facility	165	Intersection Leg (each approach)	Marked crosswalk with raised island Marked crosswalk with no island

ADA Compliance Assessment

Locations of required detectable warnings (truncated domes) on curb ramps per U.S. Department of Justice 2010 ADA Standards for Accessible Design.
Locations of accessibility parking spaces using Accessibility Symbol detections.

Confirm and Document Installation of Countermeasures

Creation of as-builts for FWHA proven Pedestrian/Bicyclist countermeasures (e.g., high-visibility crosswalks, advance stop and yield lines, and pedestrian refuge islands).