I always found our road classification guidelines to be too imprecise and at
the same time too complicated. Even after months of being an active mapper I
still found myself reading the guidelines over and over again to confirm if my
chosen classifications would really meet all the different criteria. Of course
it is challenging to precisely define something that's inherently full of grey
areas, but I think your efforts are a great step into the right direction.
As of now we have a summary in tabular form on the page of general mapping
conventions and also the more detailed but seemingly independently written page
for road classifications. It seems to me that the proposal in its current form
could not fully replace either of them.
I agree with many of the suggested changes (especially for the higher road
classes), I just find some of the wordings a bit overly complicated and some of
the descriptions a bit narrowly defined. As for removing the urban bias, I
think we should put in some additional effort in redefining the lower road
classes. In my daily mapping I find that a huge part of the inaccurate road
classifications happen with tertiary, unclassified, tracks and paths.
Here is my attempt in compounding a structured overview based on your proposal,
some of the old definitions and some new suggestions:
* Tag
* Title
* Description
* Examples and Characteristics
* Motorway
* High Speed Routes
* Limited-Access Expressways
* Always Grade-Separated
* Speed Limit: 100 km/h
* Speed Limit: 80 km/h (Trucks and Buses)
* Minimum Speed: 60 km/h
* Trunk
* Major National Transportation Backbone Routes
* Major Highways connecting Key Cities
* Diversion/Bypass Roads of Key Cities
* Non Grade-Separated Expressways
* Almost All National Primary Roads (N1-N99)
* Some National Secondary Roads (N100-N999)
* Typical Number of Lanes: 4-6
* Typical Speeds: 60-80 km/h
* Primary
* Roads of Major Regional Importance
* Major Highways connecting Minor Cities and Key Municipalities
* Diversion/Bypass Roads of Minor Cities and Key Municipalities
* Major Urban Arteries
* Most National Secondary Roads (N100-N999)
* Some National Tertiary Roads
* Typical Number of Lanes: 2-4
* Typical Speeds Urban: 30-60 km/h
* Typical Speeds Rural: 60-80 km/h
* Secondary
* Roads of Minor Regional Importance and Major Local Importance
* Main Roads connecting all Municipalities
* Main Roads connecting Key Barangays
* Minor Urban Arteries
* Most National Tertiary Roads
* Typical Number of Lanes: 2-4
* Typical Speeds Urban: 30-40 km/h
* Typical Speeds Rural: 40-80 km/h
* Sometimes Unpaved in Rural Areas
* Tertiary
* Roads of Local Importance
* Urban: Collector Roads or Major Local Streets
* Typical Number of Lanes: 2
* Typical Speeds: 30-40 km/h
* Rural: Roads connecting Barangays and big Sitios or Puroks
* Typical Number of Lanes: 2
* Typical speeds: 30-60 km/h
* Sometimes Unpaved
* Unclassified
* Roads of Minor Local Importance
* Urban: Mixed-use Non-residential Roads
* Typical Number of Lanes Urban: 2
* Typical Speeds Urban: 30-40 km/h
* Rural: Roads connecting small Sitios or Puroks
* Typical Number of Lanes Rural: 1
* Typical speeds Rural: 30-60 km/h
* Often Unpaved
* Residential
* Residential Roads
* Roads specifically used to access Houses
* Typical Number of Lanes: 1-2
* Typical Speeds: 10-30 km/h
* Often has Traffic calming Measures
* Sometimes Unpaved
* Service
* Roads with specific Function
* Parking Lot Roads, Drive-Thru Lanes, Access Roads around Buildings,
Private Driveways
* Farm Driveways, Single-track Farm Roads
* Typical Number of Lanes: 1-2
* Typical Speeds: 10-30 km/h
* Track
* Very rough Roads
* Roads only accessible by 4x4 or Motorbike
* Access Roads to Farmland and very remote Sitios
* Typical Number of Lanes: 1
* Often passes through Waterways
* Often impassable during heavy Rain
* Path
* Paths
* Paths leading to very remote Sitios
* Hiking Trails, Mountain Bike Trails
* Only accessible by Foot or Bicycle
* Typical Width: 0.5-1.5 m
* Usually unpaved
* Footway
* Footways
* Paths specifically for Pedestrians
* Paths in Parks, Paths around Houses, Sidewalks
* Typical Width: 0.5-1.5 m
* Living Street
* Living Street
* Narrow Streets mostly filled with Pedestrians and Pedicabs
* Typical Number of Lanes: 1-2
* Typical Speeds: <5 km/h
What do you think of it?
- Timmy Tesseract
On 02/11/2019 09:34, Jherome Miguel wrote:
After around 3 weeks of some discussion in GitHub about redefining road
classifications for the Philippines, I came by a polished proposal, which can
be summarized as:
* Motorway - expressways. Implies legal traffic restrictions under the
Limited Access Highway Act. Implied speeds: 100 (maximum), 80 (maximum for
trucks and buses), 60 (minimum)
* Trunk - major national transportation backbone routes connecting key
cities; expressway segments where not grade-separated, implied legal traffic
restrictions do not apply (e.g. motorcycles below 400cc explicitly permitted).
Typical speeds: 80 (rural), 60 (urban)
* Primary - (rural) roads of regional importance, connecting large
municipalities and other cities with each other and the trunk network. Usually
a secondary national road, or 3-digit route; (urban) major arteries, usually
secondary national roads. Typical speeds: 80 (rural), 60 (urban divided or
multilane undivided), 40 (urban two-lane)
* Secondary - (rural) roads that connect smaller municipalities with each
other and the primary network, or roads that connects cities and municipalities
with each other without traversing the primary or trunk networks: (urban) minor
arteries, usually those that connects 3+ barangays or city districts. Typical
speeds: 60 (rural), 40 (urban)
* Tertiary - (rural) roads that connects other barangays with each other
and the secondary roads; (urban) collector roads or major local streets,
usually within 1 or between 2 barangays or city districts. Typical speeds: 40
(rural), 30 (urban). Usually follows more winding alignments and have traffic
calming measures to discourage through traffic.
* Unclassified - (rural) minor roads which neither fit any of the classes
above and residential; (urban) minor mixed-use or non-residential road. Speed:
30 (rural), 20 (urban)
* Residential - roads specifically used to access houses. Speeds: 20, 30
(in some places where streets have sidewalks. must be indicated by signage)
* Service - unnamed access roads around buildings or private property,
parking lot roads, long private driveways, drive-thru lanes. Typical speeds:
10-20 km/h
* Living street (considered for dropping, but there is some consensus to
keep it, however with a narrower definition that better reflects the reality
since the road clearing operations that make a redefinition necessary) - narrow
streets where two-way traffic cannot pass smoothly, and vehicles must travel
very slowly, approximately at the same speed as pedestrians.
The proposal largely borrows some of the principles that are used on the road
classification guidelines for Canada and Australia, such as functional types,
but with adaptations to the Philippine context.
The main goals of the revised road classifications are to distinguish between
urban and rural roads (which the existing classification system have failed to
do due to its apparent bias toward urban roads), improve routing by creating a
general road hierarchy, and at a lesser extent, reflect the official road
classification (which now includes functional info since around 2014, but for
OpenStreetMap purposes, just one criterion to consider the correct
classification of some roads). In the previous guideline, I see the definition
of the primary classification as too broad, and in regards to towns served, a
primary should better serve the largest ones, usually a regional economic or
tourist center.
Since some roads lie in a gray area in OSM's road classification system, there
is a set of criteria that are useful when to consider a change in
classification of a certain road or road section. In general, the functional
type is the most important determinant of the OSM road classification, but some
other criteria can also influence it.:
* Functional type (controlled-access highway/major transportation
backbone/regional highway/major artery/local highway/minor
artery/collector/local road) - can be determined through usual traffic patterns
* Official classification (Expressway/National Primary Road/National Secondary
Road/National Tertiary Road/Provincial Road/others)
* Size (two-lane undivided, multilane undivided, divided)
* Speed (higher speeds = consider upgrading, lower speeds = consider
downgrading. Generally useful when to distinguish between secondary and
tertiary, or tertiary or unclassified/residential.)
Since the most important details of the proposal are provided, it is time now
for anyone to provide any further comments and discussion just before this can
be published on the Philippine mapping guidelines at the wiki.
--TagaSanPedroAko--
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