Justtheotherday, I wasstuckin a trafficjamfortwohours.
When I took a breakfromyellingatotherdrivers, I startedtothinkaboutthewordtraffic.
TrafficinEnglishis a noncountnoun.
Inotherwords, Englishspeakersdon't maketrafficpluralbyaddingan S, andyouwon't hearEnglishspeakersuse a anorthebeforetraffic, soyouwillnothearEnglishspeakerssay I wasstuckintrafficsor I wasstuckinthetraffic.
Eventhoughtrafficrefersto a lotofindividualcarsthatyoucancountEnglishspeakersconsidertraffictobe a noncountnoun.