What is the “TSSSS” sound a bus or a truck makes? 982 viewsJanuary 3, 2024 Question92.14K August 22, 2020 0 Comments edit: Solved. Thanks guys In: Engineering 19 Answers ActiveNewestOldest Anonymous Posted August 22, 2020 0 Comments In addition to the air brakes, buses and trucks use air suspension, so you may be hearing them releasing air from their bags. Most times when a bus stops, it releases air to lower the bus and make it easier for passengers to hop off. You are viewing 1 out of 19 answers, click here to view all answers. Register or Login
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