Vehicles don’t even use lanes properly in Cities Skylines. They all line up single file in one lane backed up all the way down the highway all the way to the edge of the map because they all want to take one of the multiple available exits. The only time they ever switch lanes is if the other lane turns left, and they switch at the last second right before the turn
Usually you start with traditional methods of expanding lanes adding overpasses and loops and then broaden into adding multiple alternative routes and eventually you dabble into designing your own custom interchange, but that isn’t enough so you research the entire history of the automobile and read every book on traffic theory and then learn about and become a master of road design and all c̴͔̚ŏ̷͔n̵̛̗c̴̫̄e̸͎̽ĩ̸̭v̵̛̳a̴̩̔b̸̩͐l̶̟͆ẽ̵̲ ̴̰͝f̵̻̓o̵͍͛r̴̯̽m̸̙̍s̵̙͐ ̵̺̚o̴͙͝f̶̮͆ ̶͓̏ǔ̵̱r̶͓͐b̶̮̆à̸̱n̶̻̍ ̸̰̒ĩ̸͖ņ̶͑t̸̩̒e̷͈͝r̸̲͠c̶̹̈́h̵̃͜a̴̺͠n̴̡͝g̴̻̽e̴̤͠s̴̩̿ ̶̯͂a̶̱͆n̸̨͆d̴̞͗ ̴͈̇t̸͎̄h̴̹̓ě̶͚i̷̛̼r̵͓̒ ̸̺̆p̶̛͓r̴̟̔o̷̥̊s̷͕̀ ̵̰͘a̵̯̍n̸̘͗ď̵̢ ̷̧̈c̶̢̀ọ̶̚n̷͍͌s̶̖͗. a̶̡̧̲̱̰̭͓̖͑s̷̨̨̱͉̗̘̦̑̑̈́̏ͅ ̴̖̀̊͐͊̈͆̒͘y̸͚͓̤̝̿͂͠ő̶͈̼̩̲̗͂ͅů̴̢̲̙̻̠͎̂ͅ ̶͇͚͚̈́̓̚̚d̶͕̦̩͓͛͗͐è̸̫̻s̵̫̰̦͈̘͉̖̩̈́́̚ç̷̰̠̺̽̔̆͐e̷͍̔̎̾n̸̡̟͉͇͖̠̎͗͊̀̾̎͠d̴̘̩̺͉̋ ̵̫̼̊̉̉̑̇͠͝f̷͖͓̩̩͙̈̌̒̊͜ü̸̮̟͖̘̑̀̃̂͌̕̚r̷͔̀̐̒͐̍͑͊ṯ̷̩̰͍̲̥̂͂h̸̼͚̞̪̫̙̞͒͂ę̷̳͉̱̙̭̈̔̈́̉̒̎r̴̡̰̩̭͖͌̐̋́̐͝ ̴͖̤̈̌̌͑î̵̼̦̭͑̒͆͐̄̕͘n̸̡̮͙̠͕̘̥͊̀̀̊͛̑͛͆ͅt̶̺̠̐̎͘ò̶̳͖̙̮̟̭̝͑̆͒͘͠ ̶̘̠̝͉̺̤͖͆̉̈́̈m̸̗͇͎̬̮͗̉a̸̘̺̓d̷̨͔̼͓͎̯̓̕͝ǹ̵̗̝̘̭̩̀̉͒̋͑͗̀é̷̙̂͌̆̈́̆s̸̫͕̈͗́̈́s̸̨͙̞͈͓̱̩̀̆̂̒͒̒̚̚͜ ̸̥̇̒̈á̷͓͙̟̹n̶͓̞̼̪̋͐̒͘d̸̙͉̫̜̾͘ ̸̳͈̝͂͗͐̄c̷͓̞͛̈͆̕ą̷̦̯͎̕n̴̗̭̼̄̍ ̷̧̈́̓͑n̸̼͇͚̈́́͜ë̸͉̥̉̿͛v̶͔́̈e̴̻̔͌̅͠r̴͖̈͘ ̵͙̮̖̣̅̌s̶̻̋͜͝t̴̛̲͝͝o̸̯̹̿p̸̠̟̭̾̇.̷̢̪͕͇͐̚ ̷͖͇̖͕̆̓H̵͙̖̀́̀͑e̷̻͑̈͘l̶̙̫̼͔̃̕̕ṗ̴̨͈̖̝̇̒̽.̷̹̲̠͈̊̾̀̕ ̴̭̼̝̍̒͌̕Ī̷̺͓̠͕̀͝ ̷̹̣̲̏͜w̶̡̩̞̔̀ȧ̵̡͚̺ǹ̴̬̘̾ţ̸̪͐́̈́ ̸̰͑ẗ̴̺̭͇͇́́͘̕o̵̠̓͑̕ ̶̨̝̄̊͒e̵̼̪͒s̶̙͕̃̄͜c̴̲̫̳̺̓͠ą̶͖̭̄̃͜͝͠p̶͍̜̈̆e̷͓͛,̷̫͕̭̓͂̅̍ ̶͖̳̂̓̇b̴̫͔͆̅̈̓ǘ̶̮̝̹̼͂t̶̠̰̻͑̄̒͜ ̴̹͋̈́͘ẗ̷͕͕̖̲́̌͒̀ḧ̶͓͉̟̺́̈͐e̴̛͖̖̗̥̕r̵̬̠̽͐ë̷̛͈̘̘̮ ̸͖͚̻̹̈́̅̀i̸̗͂̎ś̸̳̳͈̾́͘ ̸̺͠n̴̢̥̲͓̄͘o̸͖̠͇͋ ̴̠͎̬̙́̌͝e̷̙̣͐̇x̴͎̱̦͆̈́͑͘ī̷̖̥̤̠̃̍̿t̶͓̞̮͊̊ ̴͔̝͌̅͒͠r̸͉̓̓͘á̵͍͕̣͜m̷̪͍͈̎́̀͂ṕ̶̧̜͕̞.̷̛̼̼̐͐ ̸̝͖̹͒̌T̵̳̹͌͠h̸̺̘̀͛̏͋e̸͎͖̳͍͂̈̎r̴̬̦͆̑͘͘ȇ̷͓ ̵͍̟̱̉̒̆i̷̺̘̇́ŝ̵̘̖ ̴̧̾̓͊̓n̴̙̋͝o̷̩̘̭͗͒̃̂ ̸̖̬͚͍̓́ė̵̗̙̱̊s̶̛̖̠͗̋͊c̸͎̬̦̈́́͗̕a̴͕̣̝̪͂̋͠p̷̠͈͕͇͝ê̶̦̣̽̀̈́.̶̨̻̐͌̈͠ ̷͓̳͂͌͋͂
Vehicles don’t even use lanes properly in Cities Skylines. They all line up single file in one lane backed up all the way down the highway all the way to the edge of the map because they all want to take one of the multiple available exits. The only time they ever switch lanes is if the other lane turns left, and they switch at the last second right before the turn
Not necessarily. This can be fixed.
Wish I knew how
Usually you start with traditional methods of expanding lanes adding overpasses and loops and then broaden into adding multiple alternative routes and eventually you dabble into designing your own custom interchange, but that isn’t enough so you research the entire history of the automobile and read every book on traffic theory and then learn about and become a master of road design and all c̴͔̚ŏ̷͔n̵̛̗c̴̫̄e̸͎̽ĩ̸̭v̵̛̳a̴̩̔b̸̩͐l̶̟͆ẽ̵̲ ̴̰͝f̵̻̓o̵͍͛r̴̯̽m̸̙̍s̵̙͐ ̵̺̚o̴͙͝f̶̮͆ ̶͓̏ǔ̵̱r̶͓͐b̶̮̆à̸̱n̶̻̍ ̸̰̒ĩ̸͖ņ̶͑t̸̩̒e̷͈͝r̸̲͠c̶̹̈́h̵̃͜a̴̺͠n̴̡͝g̴̻̽e̴̤͠s̴̩̿ ̶̯͂a̶̱͆n̸̨͆d̴̞͗ ̴͈̇t̸͎̄h̴̹̓ě̶͚i̷̛̼r̵͓̒ ̸̺̆p̶̛͓r̴̟̔o̷̥̊s̷͕̀ ̵̰͘a̵̯̍n̸̘͗ď̵̢ ̷̧̈c̶̢̀ọ̶̚n̷͍͌s̶̖͗. a̶̡̧̲̱̰̭͓̖͑s̷̨̨̱͉̗̘̦̑̑̈́̏ͅ ̴̖̀̊͐͊̈͆̒͘y̸͚͓̤̝̿͂͠ő̶͈̼̩̲̗͂ͅů̴̢̲̙̻̠͎̂ͅ ̶͇͚͚̈́̓̚̚d̶͕̦̩͓͛͗͐è̸̫̻s̵̫̰̦͈̘͉̖̩̈́́̚ç̷̰̠̺̽̔̆͐e̷͍̔̎̾n̸̡̟͉͇͖̠̎͗͊̀̾̎͠d̴̘̩̺͉̋ ̵̫̼̊̉̉̑̇͠͝f̷͖͓̩̩͙̈̌̒̊͜ü̸̮̟͖̘̑̀̃̂͌̕̚r̷͔̀̐̒͐̍͑͊ṯ̷̩̰͍̲̥̂͂h̸̼͚̞̪̫̙̞͒͂ę̷̳͉̱̙̭̈̔̈́̉̒̎r̴̡̰̩̭͖͌̐̋́̐͝ ̴͖̤̈̌̌͑î̵̼̦̭͑̒͆͐̄̕͘n̸̡̮͙̠͕̘̥͊̀̀̊͛̑͛͆ͅt̶̺̠̐̎͘ò̶̳͖̙̮̟̭̝͑̆͒͘͠ ̶̘̠̝͉̺̤͖͆̉̈́̈m̸̗͇͎̬̮͗̉a̸̘̺̓d̷̨͔̼͓͎̯̓̕͝ǹ̵̗̝̘̭̩̀̉͒̋͑͗̀é̷̙̂͌̆̈́̆s̸̫͕̈͗́̈́s̸̨͙̞͈͓̱̩̀̆̂̒͒̒̚̚͜ ̸̥̇̒̈á̷͓͙̟̹n̶͓̞̼̪̋͐̒͘d̸̙͉̫̜̾͘ ̸̳͈̝͂͗͐̄c̷͓̞͛̈͆̕ą̷̦̯͎̕n̴̗̭̼̄̍ ̷̧̈́̓͑n̸̼͇͚̈́́͜ë̸͉̥̉̿͛v̶͔́̈e̴̻̔͌̅͠r̴͖̈͘ ̵͙̮̖̣̅̌s̶̻̋͜͝t̴̛̲͝͝o̸̯̹̿p̸̠̟̭̾̇.̷̢̪͕͇͐̚ ̷͖͇̖͕̆̓H̵͙̖̀́̀͑e̷̻͑̈͘l̶̙̫̼͔̃̕̕ṗ̴̨͈̖̝̇̒̽.̷̹̲̠͈̊̾̀̕ ̴̭̼̝̍̒͌̕Ī̷̺͓̠͕̀͝ ̷̹̣̲̏͜w̶̡̩̞̔̀ȧ̵̡͚̺ǹ̴̬̘̾ţ̸̪͐́̈́ ̸̰͑ẗ̴̺̭͇͇́́͘̕o̵̠̓͑̕ ̶̨̝̄̊͒e̵̼̪͒s̶̙͕̃̄͜c̴̲̫̳̺̓͠ą̶͖̭̄̃͜͝͠p̶͍̜̈̆e̷͓͛,̷̫͕̭̓͂̅̍ ̶͖̳̂̓̇b̴̫͔͆̅̈̓ǘ̶̮̝̹̼͂t̶̠̰̻͑̄̒͜ ̴̹͋̈́͘ẗ̷͕͕̖̲́̌͒̀ḧ̶͓͉̟̺́̈͐e̴̛͖̖̗̥̕r̵̬̠̽͐ë̷̛͈̘̘̮ ̸͖͚̻̹̈́̅̀i̸̗͂̎ś̸̳̳͈̾́͘ ̸̺͠n̴̢̥̲͓̄͘o̸͖̠͇͋ ̴̠͎̬̙́̌͝e̷̙̣͐̇x̴͎̱̦͆̈́͑͘ī̷̖̥̤̠̃̍̿t̶͓̞̮͊̊ ̴͔̝͌̅͒͠r̸͉̓̓͘á̵͍͕̣͜m̷̪͍͈̎́̀͂ṕ̶̧̜͕̞.̷̛̼̼̐͐ ̸̝͖̹͒̌T̵̳̹͌͠h̸̺̘̀͛̏͋e̸͎͖̳͍͂̈̎r̴̬̦͆̑͘͘ȇ̷͓ ̵͍̟̱̉̒̆i̷̺̘̇́ŝ̵̘̖ ̴̧̾̓͊̓n̴̙̋͝o̷̩̘̭͗͒̃̂ ̸̖̬͚͍̓́ė̵̗̙̱̊s̶̛̖̠͗̋͊c̸͎̬̦̈́́͗̕a̴͕̣̝̪͂̋͠p̷̠͈͕͇͝ê̶̦̣̽̀̈́.̶̨̻̐͌̈͠ ̷͓̳͂͌͋͂