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    Visibility of New Dashed Yellow and White Center Stripes as Function of Material Retroreflectivity

    Zwahlen, Helmut T. / Schnell, Thomas | Transportation Research Record | 2019

    Advance Warning Signals: Long-Term Monitoring Results

    Schnell, Thomas | Online Contents | 2009

    Performance Evaluation of Pavement Markings Under Dry, Wet, and Rainy Conditions in the Field

    Aktan, Fuat / Schnell, Thomas | Transportation Research Record | 2004

    Effect of Luminance and Text Size on Information Acquisition Time from Traffic Signs

    Schnell, Thomas / Yekhshatyan, Lora / Daiker, Ron | Transportation Research Record | 2009

    Minimum In-Service Retroreflectivity of Pavement Markings

    Zwahlen, Helmut T. / Schnell, Thomas | Transportation Research Record | 2000