Human Factors Guidelines for Road Systems: Second Edition (2012) / Chapter Skim
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Pages 153-167
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Behavioral Framework for Speeding .
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BEHAVIORAL FRAMEWORK FOR SPEEDING Introduction Behavioral framework for speeding refers to a conceptual overview of the key factors relevant to speed selection, as well as their relationship to potential speeding countermeasures. The figure below provides such a framework and attempts to capture the relevant driver, vehicle, roadway, and environment (DVRE)
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Discussion A substantial amount of research has been done on the causes of speeding and it is clear that speeding is a complex driving behavior. There is typically no single simple solution for addressing speeding concerns.
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SPEED PERCEPTION AND DRIVING SPEED Introduction Speed perception refers to a driver's judgment of how fast he or she is traveling. While direct speed information is available from the speedometer, drivers still rely heavily on cues from the environment to judge how fast they are traveling.
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Discussion In Fildes, Fletcher, and Corrigan (2) , subjects viewed film presentation of moving scenes in a laboratory setting.
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EFFECTS OF ROADWAY FACTORS ON SPEED Introduction The effects of roadway factors on speed refers to the impact of geometric, environmental, and traffic factors on driving speed under free-flow conditions in tangent roadway sections. Speed in curve entry is covered in Chapter 6.
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Discussion As the table on the previous page makes clear, the empirical record is far from conclusive with respect to the ability to predict drivers' speed choices associated with relevant geometric, environmental, and traffic factors. Nonetheless, some relationships between drivers' speed choices and these factors -- however tentative -- have emerged from the literature and are worth presenting here.
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EFFECTS OF POSTED SPEED LIMITS ON SPEED DECISIONS Introduction The effects of posted speed limits on speed decisions refers to the impact that posted speed has on actual speeds selected by drivers. This guideline covers light-vehicle driver compliance with posted speed limits on non-limitedaccess rural and urban highways.
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Discussion It is quite clear from both everyday observation and existing research data that mo st drivers do not comply with posted speed limits. In Harkey, Robertson, and Davis ( 3 )
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SPEEDING COUNTERMEASURES: SETTING APPROPRIATE SPEED LIMITS Introduction Setting appropriate speed limits refers to guidelines and best practices for determining appropriate speed limits that take into account the unique traffic, design, and environmental aspects of the roadway. Much of the information in this guideline, as well as its companion guidelines ("Speeding Countermeasures: Communicating Appropriate Speed Limits" on page 17-12 and "Speeding Countermeasures: Using Roadway Design and Traffic Control Elements to Address Speeding Problems," on page 17-14)
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Discussion As discussed in Neuman et al.
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SPEEDING COUNTERMEASURES: COMMUNICATING APPROPRIATE SPEED LIMITS Introduction Communicating appropriate speed limits refers to guidelines and best practices for communicating posted speed limits to drivers. Much of the information in this guideline, as well as its companion guidelines ("Speeding Countermeasures: Setting Appropriate Speed Limits" on page 17-10 and "Speeding Countermeasures: Using Roadway Design and Traffic Control Elements to Address Speeding Problems" on page 17-14)
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Discussion As discussed in Neuman et al.
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SPEEDING COUNTERMEASURES: USING ROADWAY DESIGN AND TRAFFIC CONTROL ELEMENTS TO ADDRESS SPEEDING PROBLEMS Introduction Using roadway design and traffic control elements to address speeding problems refers to guidelines and best practices for selecting and using geometric design features and traffic signals to support safe speed decisions by drivers. Much of the information in this guideline, as well as its companion guidelines (Speeding Countermeasures: Setting Appropriate Speed Limits on page 17-10 and Speeding Countermeasures: Communicating Appropriate Speed Limits on page 17-12)
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Discussion As discussed in Neuman et al.
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