Arizona Bicycle Network 68 08/04/03

7. Arizona Bicycle Network

The Statewide Bicycle Network includes the ADOT State Highways that are described in Section 5, plus the regionally significant non-ADOT bicycle facilities from the existing plans that are described in Section 6. Together they provide mobility for bicyclists throughout the state. A description of the data that was evaluated to assess the bicycling conditions on the ADOT State Highway System is provided in Section 5.2. The Arizona Bicycle Network is comprised of roadways within the State Highway System, except where bicycles are specifically prohibited, and it includes regionally significant non-ADOT bicycle facilities. Combining this information onto one map provides users with valuable information regarding the major bicycle routes within the State and specifies where there are alternative routes to the State Highway System.

Bicycling conditions on ADOT’s State Highway System were last evaluated by ADOT in 1996 and they are depicted on the 1996 Bicycle Suitability map shown in Exhibit 2. As described in Section 5, each roadway segment is ranked as more suitable, less suitable, or prohibited. Instead of updating this map in its current format, the Steering Committee prefers to show certain bicycling conditions, similar to states such as Montana and Kansas. With this format, specific roadway conditions are provided directly to the user for the user to select what is suitable. It is acknowledged that there will need to be a disclaimer on the map stating that information is not guaranteed to be accurate due to the extensive roadway network and changing roadway conditions.

The Arizona Bicycle Network map includes the both regionally significant non-ADOT routes and roadways within the State Highway System. The following information was considered for inclusion on ADOT State Highways:

Traffic volume;

Percent grade;

Right shoulder width;

Roadway speed limit;

Rumble strip location; and

Shoulder pavement condition.

It is important to keep the information simplified on user maps, so users are able to easily interpret the map. It is possible to have one data set colored along the route segment with a second data set providing the border color of the segment. The right shoulder width of both the segment and any bridges along the segment is the most critical information. The presence of rumble strips is very important; however, definitive information on the location of rumble strips and the effective width of the shoulder is not currently available. The second most important criterion of the available data is the traffic volume to capacity ratio. Exhibits 8 and 8B depict the Arizona Bicycle Network and include right shoulder width and traffic volume data. The traffic volume range is shown with the corresponding approximate hourly traffic volume referenced.

It is recommended that implementation of the Plan include the development, printing, and distribution of a fold out user map that combines the data presented in Exhibit 8 with educational information and other resources for bicyclists. This user map is anticipated to be similar to the Cycle Arizona Map of Suitable Bicycle Routes on the State Highway System that ADOT printed in 1998 for free distribution.

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PHOENIX METRO AREA

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Exhibit 8: Arizona Bicycle Network

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Shoulder Width >= 5 ftShoulder Width = 3 to 4 ftShoulder Width = 0 to 2 ftBicycles ProhibitedNon-ADOT Bicycle Routes

AADT 7500Interstate Frontage RoadsBridge with Shoulder Width < 4 ft

Notes: All ADOT state highways not designated as bicycles prohibitedare included in the Arizona Bicycle Network. Facilities conditions shownon this map are not guaranteed and often vary from one side of the roadto the other.

* A typical hourly traffic volume in one direction is approximatelyequal to 6% of the Average Daily Traffic Volume (AADT),so a 7,500 AADT is approximately 450 vehicles per hour (vph), and a 2,500 AADT = 150 vph.

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LegendShoulder Width >= 5 ftShoulder Width = 3 to 4 ftShoulder Width = 0 to 2 ftBicycles ProhibitedUnpaved Shared Use PathPaved Shared Use PathNon-ADOT Bicycle RouteAADT 7500Interstate Frontage Roads

Bridge with Shoulder Width < 4 ft

Arizona Statewide Bicycle and Pedestrian Plan

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Bell Rd

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Exhibit 8b: Arizona Bicycle Network(Local Areas)

Note: All ADOT state highways not designated as bicycles prohibitedare included in the Arizona Bicycle Network. Facilities conditions shownon this map are not guaranteed and often vary from one side of the roadto the other.

* The hourly traffic volume in one direction is approximatelyequivalent to 6% of the Average Daily Traffic Volume (AADT),so a 15,000 AADT = 900 vehicles per hour (vph), a 7,500 AADT = 450 vph and a 2,500 AADT = 150 vph.