Narrative:

Upon receipt of takeoff clearance on runway 1R in las; tower advised that another aircraft would be cleared for takeoff from 1L but that it would be no factor. Shortly after takeoff at approximately 300 feet we received a resolution advisory; directing us to 'maintain vertical speed'. This was shortly after our power reduction; so to maintain the vertical speed we decreased our airspeed. I noticed that the aircraft to our left was co-altitude and very close on TCAS. Later; the flight attendant remarked that the aircraft on our left during takeoff was very close. The two runways are very close together at las; and it seems that two aircraft should not be allowed to take off at exactly the same time. There's very little margin for error. Also; most aircraft taking off on the left runway are smaller civilian aircraft. These pilots may not have very much experience. Any deviation from center line could be disastrous if both aircraft are cleared for takeoff at the same time. Also; our aircraft flight director takes off in runway track or navigation if on an RNAV SID; where others may take off initially with runway heading if not RNAV capable. If there's a left crosswind this would cause the aircraft taking off in heading from the left runway to veer into the path of the aircraft on the right runway. I've seen this problem before at las when taking off to the north; so this is an issue that needs to be addressed.

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Original NASA ASRS Text

Title: LAS Air Carrier departure from Runway 1R received a TCAS RA from traffic departing Runway 1L; traffic information was provided to both involved aircraft.

Narrative: Upon receipt of takeoff clearance on Runway 1R in LAS; tower advised that another aircraft would be cleared for takeoff from 1L but that it would be no factor. Shortly after takeoff at approximately 300 feet we received a resolution advisory; directing us to 'maintain vertical speed'. This was shortly after our power reduction; so to maintain the vertical speed we decreased our airspeed. I noticed that the aircraft to our left was co-altitude and very close on TCAS. Later; the flight attendant remarked that the aircraft on our left during takeoff was very close. The two runways are very close together at LAS; and it seems that two aircraft should not be allowed to take off at exactly the same time. There's very little margin for error. Also; most aircraft taking off on the left runway are smaller civilian aircraft. These pilots may not have very much experience. Any deviation from center line could be disastrous if both aircraft are cleared for takeoff at the same time. Also; our aircraft flight director takes off in runway track or NAV if on an RNAV SID; where others may take off initially with runway heading if not RNAV capable. If there's a left crosswind this would cause the aircraft taking off in heading from the left runway to veer into the path of the aircraft on the right runway. I've seen this problem before at LAS when taking off to the north; so this is an issue that needs to be addressed.

Data retrieved from NASA's ASRS site as of April 2012 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.