Research was performed to assess the effectiveness of a dynamic speed feedback sign (DSFS) as a speed reduction countermeasure when installed at horizontal curves on rural highways. It was of particular interest to assess whether the DSFS effectiveness varied based on curve advisory speed and to identify the optimal DSFS placement location with respect to the curve. A series of field evaluations were performed at five horizontal curves located along two-lane rural state highways in northern Michigan possessing posted speed limits of 65 mph and curve advisory speeds varying between 25 and 60 mph. The DSFSs were installed and evaluated at two different locations at each curve: 1. at the curve advance warning/advisory speed sign and 2. at the point of curvature. Vehicle speeds were tracked along the approach to each curve using handheld LIDAR guns. The results indicate that the DSFS was generally more effective at reducing motorists’ speeds when installed near the advance curve warning sign. Furthermore, the DSFS was more effective at locations with sharper curvature (i.e., lower advisory speeds). Continued use of DSFSs as a speed reduction countermeasure on rural horizontal curves is recommended, particularly at locations with a significant differential (e.g., at least 25 mph) between the upstream speed limit and the curve advisory speed. The DSFS should be positioned near the advance curve warning/advisory speed sign to provide adequate time for drivers to react and decelerate before reaching the curve.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Evaluating Driver Response to a Dynamic Speed Feedback Sign at Rural Highway Curves


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board




    Publication date :

    2022-08-08




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Driver Response to a Dynamic Speed Feedback Sign at Speed Transition Zones Along High-Speed Rural Highways

    Mahmud, Md Shakir / Megat Johari, Megat Usamah / Bamney, Anshu et al. | Transportation Research Record | 2022


    Driver Response to a Dynamic Speed Feedback Sign at a Freeway Exit Ramp Considering the Sign Design and Installation Characteristics

    Mahmud, Md Shakir / Gates, Timothy J. / Savolainen, Peter Tarmo et al. | Transportation Research Record | 2022


    Evaluation of Alternative Messages and Sign Locations on Driver Response to a Dynamic Speed Feedback Sign on a Freeway Interchange Ramp

    Gates, Timothy J. / Mahmud, Md Shakir / Ingle, Anthony J. et al. | Transportation Research Record | 2020


    An Analysis of Driver Behaviour Through Rural Curves: Exploratory Results on Driver Speed

    Blair Turner / Jeremy Woolley / Peter Cairney | DOAJ | 2015

    Free access

    Driver Response to a Dynamic Speed Feedback Sign on Freeway Exit Ramps Based on Sign Location, Interchange Type, and Time of Day

    Mahmud, Md Shakir / Motz, Matthew / Holpuch, Travis et al. | Transportation Research Record | 2021