Read the following paragraph and answer the question. Give ONLY the answer, no other words or explanation.

For example:

Answer: <most likely answer, as short as possible>.

Paragraph: Today THE 1 km - long Ghan passenger train was involved in another accident yesterday when it ran into a grandmother 's car trying to nip across a level crossing . Motorist Gwen Rogers , 77 , who was driving to hospital for treatment to a bad arm , said she thought the train was moving so slowly that she would have time to get over the track . " I sort of looked that way , " she said . " But when I looked the other way I heard the train 's horn blow . "

Question: What may be the reason for the accident ?
The woman made bad judgement while driving .
The grandmother tried to cross the level crossing as the train was approaching.