Lane Change Assistance (LCA) system in cars can potentially mitigate blind spot related crashes; but its effectiveness largely depends on driver acceptance and proper use. Although still in early stages, the volume of cars equipped with LCA system is expected torise in the near future as the technology has been considered in the New Car Assessment Program for Southeast Asian Countries (ASEAN NCAP) 2017 Rating Scheme. Therefore, this study is initiated to assess user acceptance of and experience with LCA-equipped cars. Self-administered questionnaires were distributed to owners of LCA-equipped cars at selected service centres in the Klang Valley from November 2016 to February 2017. From a total of 276 valid responses, results revealed that most owners greatly considered LCA system when purchasing their cars and agreed that the systems had positively altered their driving behaviours i.e. regularly using the turn signal and checking the side mirrors. Nevertheless, about 20% of the respondents stated theirannoyance and distraction by the LCA systems due to unnecessary warnings from various sources, aside from getting too many warnings during traffic congestion. The study findings provide some practical implications that can aid the industry and relevant stakeholders in gauging the issue and actual situations concerning the use of LCA system in Malaysia.
Driver acceptance ; driver assistance system ; early adopter ; lane change assistance system

Discomfort due to riding a motorcycle is an issue that need to be addressed as it has long-term effects of musculoskeletal disorders on motorcyclists especially among occupational motorcyclist. Thus, this study was conducted to analyse the rating of muscle discomfort and correlation with the risk factors among traffic police riders. A cross-sectional study was carried out among 137 male traffic police riders (high-powered motorcycle) with the age between 20 to 39 years old. The 100-mm visual analogue scale questionnaire included ratings of perceived discomfort scales for 20 specific body regions was used in the study. The results indicate that the lower back (left and right) were the highest mean of discomfort which were 56.6 mm and 55.9 mm respectively. This followed with right (48.5±36.2 mm) and left (48.4±30.3 mm) upper back, and right hand (47.0±33.0 mm). The mean of overall discomfort ratings for all regions were more than 20 mm. Besides, there is a strong positive significant correlation between duration of ridings (hours) and overall discomfort ratings (p<0.01, r=0.785) and moderate positive correlation between year of traffic police motorcycle riding experience and overall discomfort ratings (p<0.01, r=0.410). As a conclusion, cumulative riding hours, riding experience and no support of the back area of the body in motorcycle seat, are the most concern in this study as this are the contributing factors to the muscle discomfort among traffic police riders while riding high-powered motorcycle. Thus, this study suggested an additional feature is needed in current motorcycle design in order to enhance comforts of traffic police riders. Also, it will improve the condition of traffic police riders’ discomfort and indirectly also improve their work and health performance as well as productivity.