12.11 Where a length of road within a type (a) CPZ has both a prohibition of waiting that would normally be indicated by a single yellow line without upright signs (see para 12.2) and a prohibition of waiting by commercial vehicles indicated by the sign to diagram 640.2A (see paras 6.18 to 6.20 and 12.15 to 12.18), drivers might associate the sign with the road marking. As the two restrictions are likely to apply at different times, it is recommended that signs to diagram 639 or 640, co–located with each sign to diagram 640.2A, are provided to supplement the yellow line.
12.12 The end of a type (a) CPZ is indicated by the sign to diagram 664. Where one zone ends and another commences, the zone end sign is replaced by the zone entry sign for the second zone. Where a road forms the boundary between two zones, it should be within one or the other zone, or excluded from both; one side of the road should not be within one zone and the other side within the other zone, as this would result in signing that is likely to be confusing to drivers.
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664 End of a controlled zone indicated by a sign to diagram 663 or 663.1
12.13 The extent of a type (a) CPZ will be determined by specific characteristics. For example, the zone could be an area where a specific parking permit is valid (see paras 7.10 to 7.15). An appropriate zone identifier may be added to the entry sign as shown on drawing P 663. The zone might be an area where the type of parking, such as pay and display (possibly with uniform charges), is the same throughout. Where the parking is time—limited with no charge (see paras 7.8 and 7.9), the prohibition on return to the parking place might be applied to the whole zone. This would be appropriate only for small zones, as it would be unreasonable to expect drivers not to return to any part of a large area; enforcement would also be difficult. The signs located at the parking bays in this type of zone would include the legend "No return to Zone A within 2 hours" (or similar), and would be based on the sign to diagram 661.1 (see para 7.8) or, if it is a disc zone, the sign to diagram 662. Such signs would require authorisation from the Department (see para 2.1) as they are not prescribed by the Regulations in this format. Again the zone identifier would be shown on the entry sign and would also apply to any permit parking within the zone. In an area with a mix of different types of parking, a zone could represent a small geographical area, the name of which may be added to the entry sign as shown on working drawing P 663 (see para 1.9).
12.14 A type (a) CPZ may be introduced to control parking within the vicinity of a sports stadium or similar facility (see para 7.41). This might be an independent zone that operates only when an event is taking place; on other days there are no zonal controls. An existing zone that operates throughout the year could have additional controls on event days; this makes the zone entry sign very complicated and should be avoided where possible. In such circumstances, all yellow line waiting restrictions within the zone should have upright signs showing times when waiting is prohibited, both on event days and on non—event days. Signs indicating parking controls on event days are not prescribed and require authorisation from the Department (see para 2.1). Additional signs should normally be provided on the approach to the zone, indicating the date of the next event, where it is not possible to include this information on the zone entry sign. These signs also require authorisation.
PROHIBITION OF WAITING BY GOODS VEHICLES AND BUSES
12.15 The sign shown in diagram 665 indicates the boundary of a type (b) CPZ (see para 12.1). The times shown on the sign usually indicate an overnight period. The sign can therefore be simplified if the prohibition applies at the same times on every day of the week, e.g. 7pm —8am, without the need to refer to midnight. As this type of zone can be used only to prohibit waiting by large vehicles, the entry signs (and those within the zone) cannot be varied to include a prohibition of loading.
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