Table 2.
Information about the noise model used to generate noise contours at Montréal-Trudeau International Airport (CYUL) in 2019 and 2020.
|
Model movements |
|||
|---|---|---|---|
| Parameter | August 14, 2019 | August 14, 2020 | % Change traffic |
| Total movements downloada (departure, arrival) | 428 | 145 | −66.1% |
| Movements in the model (departure, arrival) | 366 | 132 | −63.9% |
| Day movements (6 a.m. to 6 p.m.) | 228 | 83 | −63.6% |
| Evening movements (6 p.m. to 10 p.m.) | 109 | 42 | −61.5% |
| Night movements (10 p.m. to 6 a.m.) | 30 | 6 | −80.0% |
| Operational runways | 4 | 1 | −50.0% |
| Prevailing windsa | N-NE | N-NE | |
|
Aircraft weight classb |
|||
| August 14, 2019 (%) | August 14, 2020 (%) | Difference | |
| Small | 0% | 2% | +2 |
| Large | 73% | 73% | 0 |
| Heavy | 27% | 26% | −1 |
|
Aircraft noise chapterc |
|||
| August 14, 2019 (%) | August 14, 2020 (%) | Difference | |
| Chapter 2 (<1977) | 0% | 2% | +2 |
| Chapter 3 (1977–2006) | 97% | 86% | −11 |
| Chapter 4 (2006–2017) | 3% | 13% | +10 |
|
Stage length (distance to fly in Nm)d |
|||
|
August 14, 2019 (%) |
August 14, 2020 (%) |
Difference |
|
| >3500 Nm | 8.5% | 6.1% | −2.4 |
|
Aircraft movements per runway (%) |
|||
|
August 14, 2019 (%) |
August 14, 2020 (%) |
Difference |
|
| Arrival | |||
| 06R | 0.64% | 46.21% | +45.57 |
| 06L | 53.50% | 0 | −53.50 |
| 24R | 19.75% | 0 | −19.75 |
| 24L | 26.11% | 0 | −26.11 |
| Departure | |||
| 06R | 59.33% | 53.79% | −5.54 |
| 06L | 11.96% | 0 | −11.96 |
| 24R | 28.23% | 0 | −28.23 |
| 24L | 0.48% | 0 | −0.48 |
: Data downloaded in flight tracking websites (Flightradar24) b: Wake turbulence separation minima is based on a grouping of aircraft types into three categories according to maximum certified take-off mass (MTOM) as follows: Small (aircraft have a certificated takeoff weight less than 41,000 lb.); Large (aircraft have a certificated takeoff weight between 41,000 lb. (18,600 kg) and 255,500 lb.); Heavy: (any aircraft with takeoff weight more than 255,500 lb. (116,000 kg)). This classification is by the FAA. c: Aircraft noise certification according to ICAO regulations, Annex 16, Volume 1. Particularly complex, the higher the chapter on noise, the more stringent the noise standards for aircraft (ICAO, 2008). d: Trip range in nautical miles (distance to fly). The stage length value is further used by IMPACT to select an associated aircraft default weight from the ANP database.