Loose Chipping Signs

The “max speed 20” plates which accompany the loose chippings signs are advisory speeds. Just like when the same sign in used with a warning for a bend or other hazard.

Mandatory limits are usually only in place when the surface dressing work is actually taking place.

amamdada:
Speed limits are not enforceable unless put in place with a Traffic Regulation Order which can be a long costly process as all orders have to be consulted on and advertised. No highway authority would go through this process for what is essentially temporary works.

Councils usually have a blanket TRO for temporary speed limits, which basically lists every classified road in the council area and every possible speed limit, which run for a year at a time.
Trunk roads are different and usually need orders for each instance, but they can cover a length of road for a period of time to allow numerous works to be carried out within that period.

Temporary limits at roadworks are mandatory - and that includes 10 mph used with convoy working.

Glen A9:
The “max speed 20” plates which accompany the loose chippings signs are advisory speeds. Just like when the same sign in used with a warning for a bend or other hazard.

Mandatory limits are usually only in place when the surface dressing work is actually taking place.

amamdada:
Speed limits are not enforceable unless put in place with a Traffic Regulation Order which can be a long costly process as all orders have to be consulted on and advertised. No highway authority would go through this process for what is essentially temporary works.

Councils usually have a blanket TRO for temporary speed limits, which basically lists every classified road in the council area and every possible speed limit, which run for a year at a time.
Trunk roads are different and usually need orders for each instance, but they can cover a length of road for a period of time to allow numerous works to be carried out within that period.

Temporary limits at roadworks are mandatory - and that includes 10 mph used with convoy working.

Not in any highway authority areas I have worked in,may be the case in your neck of the woods but not down sarf!

amamdada:
Not in any highway authority areas I have worked in,may be the case in your neck of the woods but not down sarf!

You can see the Statutory Instruments, which include speed limits on trunk roads, here: legislation.gov.uk/ssi/2015 Some larger works get specific orders, others are covered by ones which list 30 mph limits for large chunks of certain roads over a three month period - which covers any works within that.

The councils have orders which just list every road and are valid for at least a year.

In all cases the limits are in force whenever the correct signs are in place.

Glen A9:

amamdada:
Not in any highway authority areas I have worked in,may be the case in your neck of the woods but not down sarf!

You can see the Statutory Instruments, which include speed limits on trunk roads, here: legislation.gov.uk/ssi/2015 Some larger works get specific orders, others are covered by ones which list 30 mph limits for large chunks of certain roads over a three month period - which covers any works within that.

The councils have orders which just list every road and are valid for at least a year.

In all cases the limits are in force whenever the correct signs are in place.

As I said may be the case in your neck of the woods.