Wembley Sports Park Integrated Access, Traffic and Car Parking Plan

AECOMWembley Sports Park Integrated Access, Traffic and Car Parking Plan35Car parking demand at Wembley Sports Park varies significantly throughout the year. In accordance withAustRoads “Guide to Traffic Management, Part 11: Parking”, it is uneconomical to supply parking to meet themaximum demand on the busiest day of the year. Instead, car parking supply should be based on satisfyingparking demand that will only be exceeded for a number of hours or days per year. This is commonly taken to bethe 85 th percentile utilisation (the number that will not be exceeded 85% of the time in peak periods). From Table5 it can be seen that the parking demand is forecast to fluctuate significantly with 869 being by far the largest 85 thpercentile demand in Stage 1 and 890 in Stage 2.The Master Plan proposes around 1,000 car parking spaces in Stage 1 and around 870 in Stage 2 excludingoverflow car parking. It is concluded that the parking supply is ample to provide for the forecast demand of allevents; except possibly for short durations during Winter Saturdays. These events would form only a fraction (fiverelative short periods on 18 Saturdays in a year) of the total operational time during the year. It would beunreasonable and unsustainable to provide more parking to prevent overflows from ever occurring. Rather thanproviding more permanent parking, the demand should be managed. This is further discussed in Section 6.0.The State Netball Centre may seat up to 1,000 people. Assuming car occupancies of two people per car for largeevents, this equates to 500 car spaces which is well within the proposed parking provision. An event at the StateNetball Centre could be held any day of the week, except for days when PNA events are scheduled. It is assumedthat any VenuesWest event on a Tuesday or Wednesday night would replace the Netball WA activities at theState Netball Centre. On Winter Saturdays (during the day), the State Netball Centre will only be able toaccommodate Netball WA training, it will not be able to accommodate events unless all spectators access the sitevia alternative means such as public transport and / or dedicated buses.5.4 Drop OffFrom this assessment, it is anticipated that the maximum total daily trips to / from the Wembley Sports Park willbe around 6% higher (increase from 3,400 to 3,600 trips on Winter Saturdays) than current trip generation levels.In Section 2.6 it was noted that the maximum current drop-off rate on Salvado Road (on Winter Saturdays) is 27vehicles in 5 minutes (average rate of 5.4 per minute). If it is assumed that the demand for drop-off will alsoincrease by 6%, then the maximum drop-off rate in the peak 5 minutes will be 5.7 vehicles per minute. Theproposed drop-off zone (north and south zones) has capacity to accommodate around 20 cars and 3 buses at anygiven time. Assuming vehicles stand for no more than 2 minutes then this should be sufficient space to cater for12 vehicles at peak times with additional spaces available.For efficient use of the drop-off facilities, it is recommended that 1-minute time restrictions be applied. This willprevent motorists from using the drop-off zone as a parking area.5.5 Traffic DistributionThe postcode data from the PNA members list (refer to Figure 18) illustrates that patrons live in all directionssurrounding the site. Even if one direction is more dominant, factors such as route choice, access constraints andmultiple trip purposes can affect traffic distribution to and from the site.An origin destination survey is required to develop a clear understanding of the actual traffic distribution. Table 6shows the estimated traffic distribution based on the data from the video surveys on Saturday, 6 August 2011.The traffic distribution will change and become more balanced with the proposed new access arrangement. Theanticipated traffic distribution for the new site layout is also shown in Table 6.Table 6Traffic DistributionScenarioSelby St North Selby St South Veryard Cr North Salvado Rd EastFrom To From To From To From ToExisting 68% 3% 23% 88% 1% 1% 8% 8%Anticipated 33% 33% 33% 33% 14% 14% 20% 20%It cannot be accurately determined what the likely distribution of traffic will be given the altered accessarrangements and there will be an inevitable increase on some roads following the changes.During normal operations, motorists can be expected to use the most direct access. However, during peakperiods traffic can be expected to redistribute to avoid congestion. For the critical events, it was thereforeassumed that the traffic will distribute reasonably evenly across the site’s access points. For the analysis (refer toSection 6.1) it was assumed traffic from Selby Street North and to Selby Street South will distribute equallyacross the Main and left-in / left-out accesses.T:\60218676 - Wembley PK TA\8 Issued Docs\8.1 Reports\Comprehensive Integrated Access RevF.docxRevision F - 8 February 2012