| PUFFIN | PAGE 3/3 | |||||||||||||||||
| PRINCES HIGHWAY NR CAMPBELL STREET | SITE NO. | 6616 | ||||||||||||||||
| OPERATION OF ADVANCE WARNING SIGNS | ||||||||||||||||||
| Special Purpose Output 1 (SPOP1) & Special Purpose Output 2 (SPOP2) | ||||||||||||||||||
| In order to operate the Advance Warning Signs by (SPOP1) & (SPOP2), the operation of | ||||||||||||||||||
| SG1and SG2 is modified as described below: | ||||||||||||||||||
| SIGNAL GROUP 1 | ||||||||||||||||||
| At the point where SG1 is free to close down (to introduce P1), SG1 is held for an 'extra time' | ||||||||||||||||||
| (see Special Movement Time No.3) before going to Yellow. This extra time is used to activate the Advance | ||||||||||||||||||
| Warning Signs (see notes on Operation of Advance Warning Signs below). | ||||||||||||||||||
| SPOP1 is on until SG1 goes green. | ||||||||||||||||||
| SIGNAL GROUP2 | ||||||||||||||||||
| At the point where SG2 is free to close down (to introduce P2), SG2 is held for an 'extra time' | ||||||||||||||||||
| (see Special Movement Time No.4) before going to Yellow. This extra time is used to activate the Advance | ||||||||||||||||||
| Warning Signs (see notes on Operation of Advance Warning Signs below) | ||||||||||||||||||
| SPOP2 is on until SG2 goes green. | ||||||||||||||||||
| Wait State 7 (WS7) | ||||||||||||||||||
| ● Drives the operation of two flashing "PREPARE TO STOP" signs on the west approach. | ||||||||||||||||||
| ● The flashing "PREPARE TO STOP" signs will be activated from a point of view prior to SG1 closing down. | ||||||||||||||||||
| This time is calculated as follows: | ||||||||||||||||||
| Time = | ||||||||||||||||||
| (Time to travel to Stop Line - Time to travel from nominal stopping distance to the Stop Line + Reaction Time) | ||||||||||||||||||
| Time = (230/22.22) - 4.5 (i.e. SG1 Yellow Time) + 1.5 | ||||||||||||||||||
| Time = (230/22.22) - 4.5 (i.e. SG1 Yellow Time) + 1.5 | ||||||||||||||||||
| Time =7 sec | ||||||||||||||||||
| Wait State 8 (WS8) | ||||||||||||||||||
| ● Drives the operation of two flashing "PREPARE TO STOP" signs on the east approach. | ||||||||||||||||||
| ● The flashing "PREPARE TO STOP" signs will be activated from a point of view prior to SG2 closing down. | ||||||||||||||||||
| This time is calculated as follows: | ||||||||||||||||||
| Time = | ||||||||||||||||||
| (Time to travel to Stop Line - Time to travel from nominal stopping distance to the Stop Line + Reaction Time) | ||||||||||||||||||
| Time = (200/22.22) - 4.5 (i.e. SG2 Yellow Time) + 1.5 | ||||||||||||||||||
| Time = (200/22.22) - 4.5 (i.e. SG2 Yellow Time) + 1.5 | ||||||||||||||||||
| Time =6 sec | ||||||||||||||||||