Transcript FRC-A_v1.0.pps

KEY ASPECTS OF NAVIGATION
- Functional Road Class-A (FRC-A)
1
Definition
 FRC = Functional Road Class
 Creates a hierarchy for roads and ferries
 Based on importance in the total road network
 Captured for all roads
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#2
FRC Classification
 Database representation of classification of roads and ferries
FRC-A
• based on importance that the constituting roads and ferries have in the total network
FRC-B
• based on the role of roads in a local/regional street network
#3
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Definition
 Functional Road Class-A is the database representation of a Classification
of roads and ferries based on the importance that the constituting roads
and ferries have in the total road network
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#4
Classification
 Functional Road Class-A represents a hierarchic classification of roads
and ferries into 9 classes:
- FRC-A1: Motorway
- FRC-A2: Major roads of high importance
- FRC-A3: Other major roads
- FRC-A4: Secondary roads
- FRC-A5.1: Local connecting roads
- FRC-A5.2: Local roads of high importance
- FRC-A6: Local roads
- FRC-A7: Local roads of minor importance
- FRC-A8: Other roads
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FRC-A1 - Motorway
 All roads which are officially assigned as motorways
Limited access
-Freeway name
-Route number
No
addresses
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FOW 1
National
arterial
FRC-A2 – Major Roads of High Importance
All roads of high importance, but not officially assigned as motorways,
which are part of a connection used for international and national traffic
and transport.
Limited
access
No
addresses
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FOW 1
Fill out
Network
FRC-A3 – Other Major Roads
 All roads used to travel between different neighboring regions of a
country
FOW 2 or 3
Non
Limited
access
Travel to
different
neighboring
regions
Fill out
Network
Addresses
possible
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FRC-A4 – Secondary Roads
 All roads used to travel between different parts of the same region.
Travel to
different parts
of the same
region
Primary
State
Highway
Rout name
or number
Addresses
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Regionally
Important
FRC-A5.1 – Local Connecting Roads
 All roads making all settlements accessible or making parts (north,
south, east, west and central) of a settlement accessible.
Rural or
Urban
arterial
Making
settlements
accessible
Fill out
road
Network
Addresses
Name or
route
number
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FRC-A5.2 – Local Roads of High Importance
 All roads, which are -on local level- the main connections in a
settlement or represent frequently used rural connections
Main
connections in
a settlement
Connects to
arterial
network
Addresses
Name or
route
number
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FRC-A6 – Local Roads
 All roads used to travel within a part of a settlement or roads of
minor connecting importance in a rural area
Access to
land parcels
Connects to
destination
roads
Travel within
part of a
settlement
Address
Name
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FRC-A7 – Local Road of Minor Importance
 All roads which only have a destination function. They are
only used to reach a certain address or destination (e.g. dead
end roads, roads inside living area, alleys: narrow roads
between buildings, in a park or garden)
Dead ends
Destination
only
Alley
1 connection to
network
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FRC-A8 – Other Roads
 All other roads which are less important for the navigation system
like
Stairs
Footpath
Pedestrian
walkway or
bridge
Land parcels
by foot
Addressed
Named
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General Capturing Rules
 FRC-A shall be captured for each captured Road Element taking
into account the rules specified below concerning closed network,
connected network and downwards excluding.
- Closed network
• Infinite sinks
• Infinite sources
- Downwards excluding
- Connected network
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Closed Network
Example :
Infinite Sink
Infinite Source
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Closed Network
 All captured Road Elements classified with a Functional Road Class-A
higher than Functional Road Class-A Local roads of minor importance
shall represent a closed network together with the captured Road
Elements classified with the higher Functional Road Class(es)-A
 Only captured Road Elements classified with Functional Road Class-A
Motorways shall not form a closed network.
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Closed Network
 Functional Road Class-A :
- motorways + major roads of high importance = closed network
- motorways + major roads of high importance + other major roads = closed
network
- motorways + major roads of high importance + other major roads + secondary
roads = closed network
- motorways + major roads of high importance + other major roads + secondary
roads + local connecting roads = closed network
-motorways + major roads of high importance + other major roads + secondary
roads + local connecting roads + local roads of high importance = closed
network
-motorways + major roads of high importance + other major roads + secondary
roads + local connecting roads + local roads of high importance + local roads =
closed network
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Downward Excluding
 FRC-A of captured Road Elements representing
roads at roundabouts, connectors, slip roads and parallel roads shall
be captured by means of downwards excluding
 FRC-A has to be based on the fact that if the Road Elements with
the lower classes are excluded, the Road Elements with the higher
classes have to form a closed network and that all connections for
traffic flow are assured.
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Downward Excluding
 When a motorway has no continuation at the roundabout, the FRC-A of
the Road Elements representing the roundabout shall not be
the same as the highest FRC-A (namely motorway) but shall be the
same as the highest FRC-A of the other captured Road Elements
joining the Roundabout.
For example as shown in the figure the FRC-A of Road Elements representing a roundabout
is the same as the highest FRC-A of the FRC-A related to the captured Road Elements which join the Roundabout
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Connected Network
 All captured Road Elements and Ferry Connections classified with a
FRC-A higher than Other roads shall represent a
connected network together with the captured Road Elements and
Ferry Connections classified with the higher FRC-A.
 Each captured Road Element and Ferry Connection
with a FRC-A higher than Other roads shall be
connected at least at one side by another captured Road Element or
Ferry Connection with the same or a higher FRC-A.
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FRC-A7 & 8 Capturing
 FRC-A7 will be assigned to any new geo:
-Private communities (1 way in or out)
-Mobile home parks
-Cemeteries
-Special restrictions
-Destination
-Apartment roads
-Rest area
 FRC 8 for
-Closed roads
-Paths or stairs
 FRC 8 is always FOW 3 or FOW 13
Bus or taxi lane = same as road
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Connectors
 FRC-A of Road Elements representing a connector depends on its
function and on the FRC-A of the Road Elements making use of the
connector to ensure complete connectivity.
 In case the connector has the function of only connecting the
carriageways of a multi carriageway, the FRC-A related to the connector
is the same as the FRC-A related to the multi carriageway
 In the rare occasions that the FRC-A related to the carriageways of a
multi carriageway differ, the Road Element(s) representing the connector
shall have the same FRC-A as the Road Elements representing the
carriageway with the lowest FRC-A
FRC-A 5.1
FRC-A 6
FRC-A 7
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Connectors
 If a connector ensures connectivity with Road Elements with FRC
Other roads and the connector can be used to make U-turns on the
multi carriageway, the FRC-A related to the connector is the same
as the FRC-A related to the multi carriageway.
FRC-A 5.1
FRC-A 8
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Connector
 Isolated connectors get FRC-A of main road.
FRC-A 5.1
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Traffic Circles
 Same as 2 highest roads leading into it.
FRC-A 5.1
FRC-A 5.2
FRC-A 6
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ETA (Enclosed Traffic Area)
 Same as roads outside of ETA
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Parallel Roads
 Same as major slip road.
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Slip Roads
 Lowest FRC of roads it is connecting.
FRC-A 5.1
FRC-A 5.2
FRC-A 7
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Service Roads
 Lower than the main road
FRC-A 5.1
FRC-A 6
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Traffic Island
 Same on both sides.
FRC-A 5.1
FRC-A 5.2
FRC-A 6
FRC-A 7
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Questions
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