14.2.2.1 The HCM
The HCM-based software, HCS is best for bicycle analysis scenarios, as depicted in .
The HCM contains methodologies for several bicycle facility types (see ), but the HCS only analyzes urban street segments and signalized intersections. For street segment analysis, the HCM uses bicycle travel speed as a major factor to determine LOS. As such, it is recommended that the HCM methodology for street segment analysis only be considered for bicycle accommodations with high volumes of bicyclists (e.g., central business districts, mixed-use developments, tourist destinations, outdoor shopping centers). It is recommended to use HCS (or another similar software tool) for analysis of bicycle accommodations at signalized intersections. LOS D is recommended as a minimum target for signalized crossings and street segments.
Facility Type | HCM Chapter and Section Number |
---|---|
Urban street facilities | 16.5 |
Urban street segments | 18.5 |
Signalized intersections | 19.6 |
Two-way stop-controlled intersections | 20.6 |
All-way stop-controlled intersections | 21.6 |
Roundabouts | 22.6 |
Ramp terminals and alternative intersections | 23.B.4 |
Off-street facilities | 24.3 |
While bicycle analysis can be conducted by hand for other accommodations covered in the HCM (i.e., accommodations besides urban street segments and signalized intersections), it is recommended to use BLTS analysis for these other accommodations.
To conduct a bicycle analysis of signalized intersections, the inputs shown below are collected and entered into the corresponding fields on the “Bicycle Mode - Signals” section of the Multimodal Input Data on HCS. Definitions of multimodal inputs are provided in the HCS User Guide. Traffic inputs for the intersection will impact LOS calculations for the analysis and are also entered.
- On-street parking occupied, proportion;
- Curb-to-curb street width, ft;
- Outside through lane width, ft;
- Bicycle lane width, ft;
- Paved shoulder width, ft; and
- Presence of curb
To conduct a bicycle analysis of urban street segments, the inputs shown below are collected and entered on the “Bicycle Mode - Streets” section of the Multimodal Input Data on HCS. Definitions of multimodal inputs are provided in the HCS User Guide. To view results, print the “segments report” found in the HCS.
- Bicycle running speed, mi/h;
- Percent heavy vehicles;
- Total number of access points; and
- Pavement condition rating