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28
SECTION IV
Roadway Segment Programs
Planning Programs Related to A link to these downloadable guides can be found at http://
Reducing Crash Types Including safety.transportation.org/guides.aspx.
Run-Off-Road, Head-On (Including
Head-Ons on Freeways), Curve, Possible Program Types Spot versus
Utility Pole, and Tree-Related System Programs
Crashes
Before moving to the specific treatment choice/targeting
This section of the guide provides the details of the four procedures for these emphasis areas, it is noted that states
levels of treatment choice and targeting procedures described who were early participants in the AASHTO safety planning
previously in the Stage 3 discussion in Section III, but oriented process for roadway-segment (and intersection) programs
to those issues/emphasis areas that are specifically related to started from two different perspectives, and the perspective
roadway segments run-off-road crashes (including those chosen determines the choice and targeting of treatments.
involving utility poles and trees), head-on crashes, and curve- Some states chose to try to expand their current "high-crash
related crashes. This group of crashes is sometimes referred to location" (HCL) program to include more locations to meet
as "lane departure" crashes. In most instances, a given proce- their overall goal. Others chose to orient their planning meth-
dure will follow the same basic steps, regardless of the crash ods to the identification and treatment of "systems" of road-
type being addressed. Where the procedure differs between ways, not just those locations that fell under the HCL pro-
crash types, this will be noted. In addition, the data needed for gram. Indeed, guidance provided in each of the guides, in
the different roadway-segment-oriented crash types will differ companion training courses, and in the draft implementation
and will be specified. The user is strongly urged to carefully plan on the FHWA website is that system-based programs
review the material in each of the pertinent guides before will need to be included. If the jurisdiction is really attempt-
beginning this planning process. These roadway-segment- ing to reach a goal which represents a significant change from
oriented guides are found within NCHRP Report 500: Guid- the current situation a stretch goal it is very unlikely that
ance for Implementation of the AASHTO Strategic Highway expansion of the HCL program will suffice. While such an
Safety Plan. The specific volumes pertinent to this section are: expansion is clearly a component of a stretch-goal plan, large-
scale treatment of systems and corridors will also likely be
· Volume 3: A Guide for Addressing Collisions with Trees in necessary.
Hazardous Locations (3) Indeed, a jurisdiction can use the following procedure to de-
· Volume 4: A Guide for Addressing Head-On Collisions (4) termine approximately how much the existing HCL program
· Volume 6: A Guide for Addressing Run-Off-Road will have to be expanded, which will provide some guidance on
Collisions (6) whether system programs should also be considered.
· Volume 7: A Guide for Reducing Collisions on Horizontal
Curves (7) 1. Examine the most recent listing of HCL projects that were
· Volume 8: A Guide for Reducing Collisions Involving Utility chosen for treatment in your jurisdiction and identify
Poles (8) those that were related to lane-departure crashes. (Note
· Volume 20: A Guide for Reducing Head-On Crashes on Free- that the same procedure could be used for intersection
ways (26). crashes).
