Environmental Research, Engineering and Management 2021/77/4 86 Prevention of Littering through Improved Visual Design EREM 77/4 Journal of Environmental Research, Engineering and Management Vol. 77 / No. 4 / 2021 pp. 86–98 DOI 10.5755/j01.erem.77.4.25043 Prevention of Littering through Improved Visual Design Received 2020/01 Accepted after revision 2021/11 http://dx.doi.org/10.5755/j01.erem.77.4.25043 *Corresponding author: hendro.johannes21@gmail.com Hendro Putra Johannes*, Rheza Maulana, Herdis Herdiansyah School of Environmental Science, Universitas Indonesia, Central Jakarta, DKI Jakarta 10430, Indonesia Littering is a daunting environmental issue that occurs daily; the impact of littering can range from lowering the aesthetic appeal of a city to polluting waterways and biomes. Littering persists on a collective and individual level despite the existence of numerous laws and regulations that prohibit it. We assume that there is a cor- relation between the effectiveness of visual aids and littering behavior. Poorly designed prohibitive signs and inaccessible trash bins could be part of the reason why littering persists. The current research aims to evaluate existing prohibitive signs and trash bins and to design some improvements. The researchers used direct ob- servation methods of visual designs based on socio-psychological persuasion techniques and a questionnaire conducted at the School of Environmental Science of Universitas Indonesia. The results showed that respond- ents were generally aware of littering being a serious issue that could lead to environmental problems. The university campus was generally clean; however, respondents stated that they often saw plastic trash in sewer and drainage areas. University residents do litter despite adverse social judgment. In addition, respondents stated that they responded better to visually pleasing encouragement posters rather than the standard prohib- itive signs on proper waste disposal behavior. Keywords: plastic littering, waste, visual design, socio-psychological persuasion.