Roads C18th Word definitions

I am researching a large collection of documents from the first half of the 18^th century related to the work of the Surveyor of the Highways for the township of Atherton in the parish of Leigh, Lancashire. These records, most of which are account sheets, are in indexed as TR Ath/E/2 in the Wigan archives.  From these it is clear the much work was being done to attempt to maintain these roads but it is difficult to understand what was actually being done. Particularly one would wish to gain a clearer impression of the appearance of these roads or tracks. Some of words in the accounts are in the Oxford dictionary but not with any clear reference to their relationship with road construction and maintenance.

I would be grateful for any explanation of what the following terms mean. I quote examples from the record of the context in which each appears.

Stoops - are described as posts but what was the connection with roads?

1715 Accounts

Studs and the setting of studs and making cops– what were they and is there any connection with sets that surfaced roads by the end of the 19^th century?

1749 Accounts

Platts – seem to be crossing points of streams, but how did they differ from bridges?

1775 Agreement

Scalpings, Quicks and quicksets?

1757 Accounts

Paving occurs frequently but did this imply a making a firm surface or simply lying down loose material such as gravel and did it involve the laying down of  cobble surfaces?

I would be grateful for any clarification of these terms.