[Talk-us] Paved Shoulder Tag for US Highways

Thomas.Roff at dot.gov Thomas.Roff at dot.gov
Wed Jun 3 16:59:25 UTC 2015


I would like to weigh in on how Federal Highway Administration treat data about shoulders. Each year, State DOTs are required to report data to the Feds about conditions and performance of roads in their respective states. This data is used to calculate future funding for the transportation system as a whole.

There are three data items related to this topic being Shoulder Type, Left Shoulder Width and Right Shoulder Width. I have provided a description of each below which can be found in a larger document called the HPMS Field Manual http://www.fhwa.dot.gov/policyinformation/hpms/fieldmanual/chapter4c.cfm . I must point out that the states provide these particular data items on only a sample of their roads so we probably do not have the data that you are looking for. I am providing the standard way States report this data to us. If this helps, great. If not, I apologize if this muddies the waters.

I will be in New York on Saturday if anyone wants to discuss this further.
Tom Roff
FHWA HPMS Program Manager



Item 37: Shoulder_Type (Shoulder Type)

Description:

The type of shoulder

Use:

For investment requirements modeling to estimate needed improvements

Extent:

All Sample Panel sections, optional for all other sections beyond the limits of the Sample Panel


Functional System



1

2

3

4

5

6

7

NHS

Int

OFE

OPA

MiA

MaC

MiC

Local

Rural

SP

SP

SP

SP

SP

SP





Urban

SP

SP

SP

SP

SP

SP

SP



FE = Full Extent  SP = Sample Panel Sections

Coding Requirements for Fields 8, 9, and 10:
Value_Numeric: Enter the code for the type of shoulder on the section.

Code

Description

1

None

2

Surfaced shoulder exists - bituminous concrete (AC)

3

Surfaced shoulder exists - Portland Cement Concrete surface (PCC)

4

Stabilized shoulder exists (stabilized gravel or other granular material with or without admixture)

5

Combination shoulder exists (shoulder width has two or more surface types; e.g., part of the shoulder width is surfaced and a part of the width is earth)

6

Earth shoulder exists

7

Barrier curb exists; no shoulder in front of curb


Value_Text: No entry required. Available for State Use.
Value_Date: No entry required. Available for State Use.
Guidance:

If the shoulder type varies over the extent of the section, code the predominant type. If left and right shoulder types differ on a divided facility, code the right shoulder type as the predominant type.
If there is a shoulder in front of a barrier curb, code this Data Item and Data Item 38 (Shoulder Width); do not code the area behind a barrier curb as a shoulder.
Disregard mountable curbs for HPMS reporting purposes. If there is a shoulder either in front of or behind a mountable curb, code this Data Item and Data Item 38 (Shoulder Width).
If a bike lane abuts the through lane, there cannot be a shoulder unless it is used as a combined shoulder/bike lane (sometimes indicated by signage or symbols on the pavement). If a bike lane or parking is completely separated from the roadway, it should not be considered.
If the section has parking abutting the through lane, there cannot be a shoulder. If there is parking on one side of a divided roadway and a shoulder or a curb on the other side, code this Data Item, Data Item 38 (Shoulder Width), and Data Item 40 (Peak Parking) accordingly. A shoulder cannot exist between a traffic lane and a parking lane.

Shoulder Type Examples:
Figure 4.49: Bituminous (Code '2')
[xFigure 4.49 shows an example of a bituminous shoulder, which would be identified as Code "2" for this Data Item.]

Figure 4.50: Stabilized (Code '4')
[Figure 4.50 shows an example of a stabilized shoulder, which would be identified as Code "4" for this Data Item.]

Figure 4.51: Combination (Code '5')
[Figure 4.51 shows an example of a combination shoulder, which would be identified as Code "5" for this Data Item.]

Figure 4.52: Earth (Code '6')
[Figure 4.52 shows an example of an earth shoulder, which would be identified as Code "6" for this Data Item.]


Item 38: Shoulder_Width_R (Right Shoulder Width)

Description:

The existing right shoulder width

Use:

For investment requirements modeling to calculate capacity and estimate needed improvements

Extent:

All Sample Panel sections, optional for all other sections beyond the limits of the Sample Panel


Functional System



1

2

3

4

5

6

7

NHS

Int

OFE

OPA

MiA

MaC

MiC

Local

Rural

SP

SP

SP

SP

SP

SP





Urban

SP

SP

SP

SP

SP

SP

SP



FE = Full Extent  SP = Sample Panel Sections

Coding Requirements for Fields 8, 9, and 10:
Value_Numeric: Enter the width of the right shoulder to the nearest whole foot.
Value_Text: No entry required. Available for State Use.
Value_Date: No entry required. Available for State Use.
Guidance:

Do not include parking or bicycle lanes in the shoulder width as further illustrated in Figures 4.56-4.58.
Code the predominant width where it changes back and forth along a roadway section.
Ensure that the total width of combination shoulders is reported.
Include rumble strips and gutter pans in shoulder width.
This width should be measured from the outer edge of the right-most through lane to the outer edge of the shoulder.

Examples of Measuring Shoulder Width:
Figure 4.53: Earth Shoulder Measurement
[Figure 4.53 shows the appropriate limits for the measurement of an earth shoulder on a given section of road.  The width is to be measured from the outer edge of the roadway (i.e. white stripe) to the break point of the shoulder.]
Earth Shoulder: Measure from the white stripe to the break point of the shoulder.
Figure 4.54: Bituminous Shoulder Measurement
[Figure 4.54 shows the appropriate limits for the measurement of a bituminous shoulder on a given section of road.  The width is to be measured from the outer edge of the roadway (i.e. white stripe) to the edge of the paved area.]
Bituminous Shoulder: Measure from the white stripe to the edge of the paved area.
Figure 4.55: Measuring Shoulders with Guardrails
[Figure 4.55 shows the appropriate limits for the measurement of a shoulder with guardrails on given section of road.  The width is to be measured from the outer edge of the through-lane (i.e. white stripe) to the face of the guardrail.]
Guardrail Present on Shoulder: Measure from the edge of through lane to the face of the guardrail.
Figure 4.56: Measuring Shoulders with Parking/Bike Lanes
[Figure 4.56 illustrates the manner in which shoulder width is to be measured for a section of road that has parking and/or bike lanes present.  The 8-foot-wide parking lane and the 5-foot-wide bike lane shown in this illustration should be excluded from the measurement of the shoulder width.]
Figure 4.57: Measuring Shoulders with Parking and Bike Lanes
[Figure 4.57 illustrates the manner in which shoulder width is to be measured for a section of road that has a bike lane present.  The 5-foot-wide bike lane shown in this illustration should be excluded from the measurement of the shoulder width.]
Figure 4.58: Measuring Shoulders with Combined Parking/Bike Lanes
[Figure 4.58 illustrates the manner in which shoulder width is to be measured for a section of road that has a combined shoulder/bike lane.  The 5-foot-wide bike lane shown as part of the shoulder in this illustration should be excluded from the measurement of the shoulder width.]
Item 39: Shoulder_Width_L (Left Shoulder Width)

Description:

The existing left shoulder width

Use:

For investment requirements modeling to calculate capacity and estimate needed improvements

Extent:

All Sample Panel sections, optional for all other sections beyond the limits of the Sample Panel


Functional System



1

2

3

4

5

6

7

NHS

Int

OFE

OPA

MiA

MaC

MiC

Local

Rural

SP

SP

SP

SP

SP

SP





Urban

SP

SP

SP

SP

SP

SP

SP



FE = Full Extent  SP = Sample Panel Sections

Coding Requirements for Fields 8, 9, and 10:
Value_Numeric: Enter the width of the left (median) shoulder to the nearest whole foot. Left shoulders should only be coded for divided highway sections.
Value_Text: No entry required. Available for State Use.
Value_Date: No entry required. Available for State Use.
Guidance:

Do not include parking or bicycle lanes in the shoulder width measurement.
Code the predominant width where it changes back and forth along a roadway section.
Ensure that the total width of combination shoulders is reported.
Include rumble strips and gutter pans in shoulder width.
This width should be measured from the outer edge of the left-most through lane to the left-most edge of the inside shoulder.



From: Brad Neuhauser [mailto:brad.neuhauser at gmail.com]
Sent: Wednesday, June 03, 2015 12:40 PM
To: Larry-CalRoadRunner
Cc: talk-us at openstreetmap.org
Subject: Re: [Talk-us] Paved Shoulder Tag for US Highways

cycleway=shoulder is used in the US too: http://overpass-turbo.eu/s/9IE  That seems to more accurately describe the situation, so I'd suggest using that tag.

I wouldn't use cycleway=lane since I'd expect that to be marked as such.
(basically +1 to Richard's follow up post on the forum http://forum.openstreetmap.org/viewtopic.php?pid=506940#p506940 )

On Tue, Jun 2, 2015 at 3:14 PM, Larry-CalRoadRunner <calroadrunner at gmail.com<mailto:calroadrunner at gmail.com>> wrote:
Hello Everyone,

The following link is a discussion I am having on the Development Forum on OSM.
Rather then going into a long explanation, it was suggested that a solution can be found here, I have provided the direct link to the discussion.

http://forum.openstreetmap.org/viewtopic.php?id=31206

Please respond to this request with a proper solution to this dilemma.
I know that every bicycle rider in the USA will be very happy, if a solution can be found that everyone can agree on.

Larry
California RoadRunner

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