With apologies to the previous answer that got linked here...the answer so linked was 8 years old and not particularly substantial, with a rather iffy source. Speaking as an FAQ Finder, please do not forget to assess the answers you link, because the Dark Ages of Early AskHistorians are most definitely a thing.

Fortunately, we've had some better ones in the intervening period. Here's two chariot posts, OP:

• u/JoshoBrouwers has an overview of chariot combat in general, which also deals with their fall at the end;
• and u/PM_ME_UR_SADDLEBREDS looks at the reasons for the rise and fall of the chariot.