Da-2000 flight crew reported an near midair collision on arrival into teb; citing airspace structure...

Narrative:

Second in command (sic) was pilot flying (PF). On arrival into teb from the north on V489. Cleared direct to unvil and descending through 3;600 feet to 3;000 feet. ATC was task saturated. Received monitor vs RA for climbing traffic at 12 o'clock 2 miles 500 below. We stopped our descent. Changed to climb RA. Began to climb and called ATC; reported RA and climbing to 4;000 feet. ATC then reported traffic and told us to 'climb; climb now'. Comm frequency was very congested. We climbed to about 4;000 feet and RA shifted to adjust vertical speed but the traffic was still climbing. We again received a climb RA. The traffic was 300 feet right under us and climbing. We continued up to about 4;800 feet before receiving clear of conflict. We reported clear and descending to 3;000 feet and received a vector for the ILS 19. We never saw the traffic.if controller had a way to block out or override incoming transmissions so that he could get a warning out.

Original NASA ASRS Text

Title: DA-2000 flight crew reported an NMAC on arrival into TEB; citing airspace structure; frequency congestion; and controller workload as contributing.

Narrative: Second in Command (SIC) was Pilot Flying (PF). On arrival into TEB from the north on V489. Cleared direct to UNVIL and descending through 3;600 feet to 3;000 feet. ATC was task saturated. Received Monitor VS RA for climbing traffic at 12 o'clock 2 miles 500 below. We stopped our descent. Changed to Climb RA. Began to climb and called ATC; reported RA and climbing to 4;000 feet. ATC then reported traffic and told us to 'Climb; climb now'. Comm frequency was very congested. We climbed to about 4;000 feet and RA shifted to adjust vertical speed but the traffic was still climbing. We again received a climb RA. The traffic was 300 feet right under us and climbing. We continued up to about 4;800 feet before receiving clear of conflict. We reported clear and descending to 3;000 feet and received a vector for the ILS 19. We never saw the traffic.If controller had a way to block out or override incoming transmissions so that he could get a warning out.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1261112
Time
Date	201505
Local Time Of Day	1201-1800
Place
Locale Reference	N90.TRACON
State Reference	NY
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Falcon 2000
Flight Phase	Descent
Route In Use	Airway V489
Flight Plan	IFR
Person 1
Function	First Officer Pilot Flying
Person 2
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Conflict NMAC
Miss Distance	Vertical 300

Da-2000 flight crew reported an near midair collision on arrival into teb; citing airspace structure; frequency congestion; and controller workload as contributing.