Travelled down in snow in silver Dodge periodically used by Penny (7)

'travelled down in snow' is the definition.
The answer and definition can be both to do with motion as well as being past participle verbs.
Maybe there's an association between them I don't understand?

'silver dodge periodically used by penny' is the wordplay.
'periodically' means one should take alternating letters (letters must be selected 'every so often').
'used by' says to put letters next to each other.
'penny' becomes 'd' (abbreviation e.g. Lsd - pounds, shillings, pence).
'silver'+'dodge'='silverdodge'
The alternating letters of 'silverdodge' are 'sledde'.
'sledde'+'d'='SLEDDED'

'in' acts as a link.

Can you help me to learn more?