Abstract:
Pavement surface condition is one of the factors
that affect driver comfort, operation speed, service volume, and
traffic safety. Even though several studies have conducted
recently to find the effect of different roadway characteristics on
traffic stream performance, not many were focused on the
impact of road roughness on operating speeds. Therefore, this
research will investigate the impact on road roughness on speed
patterns for different roadway segments under different flow
levels. The unevenness of a road is measured as road roughness
and it has been globally accepted as a metric to evaluate the
pavement condition and it relates to the conditions perceived by
the road users. In addition to the user discomfort, rough roads
would result in, speed reduction and an increase in vehicle
operating costs. International Roughness Index (IRI) measured
by smartphone application is used as the indicator for road
roughness in this study. The effect of road roughness is
investigated at Free Flow Speed (85th percentile speed) and 50th
percentile speed which is determined using the speed
distributions that occurred during specific time intervals.
Further, the abovementioned behavior is analyzed separately
for junctions, mid-block sections, and horizontal curves to
represent different roadway conditions.
Citation:
C. Abeygunawardhana, R. M. K. Sandamal and H. R. Pasindu, "Identification of the Impact on Road Roughness on Speed Patterns for Different Roadway Segments," 2020 Moratuwa Engineering Research Conference (MERCon), 2020, pp. 425-430, doi: 10.1109/MERCon50084.2020.9185387.