A B737 FIRST OFFICER DESCRIBED A VISUAL APPROACH TO LAS RUNWAY 1R WITH PARALLEL TRAFFIC ON 1L. TCAS ALERTS PREVENTED HIM FROM FLYING THE DESCENT RATE HE WOULD HAVE LIKED UNTIL HE OFFSET AND FLEW AN ANGLED FINAL.

Narrative

I WAS THE PF; THE CAPT WAS PLT MONITORING. WX WAS CLR AND NOT A FACTOR. WE WERE JUST GIVEN A TURN TO A R BASE AND CLRED FOR THE VISUAL TO RWY 1R AT LAS VEGAS. WE WERE DSNDING TO 6000 FT MSL; FLAPS 5 DEGS; AND SLOWING TO CONFIGURE AND DSND A LITTLE MORE AGGRESSIVELY. I PLANNED ON SQUARING THE TURN TO FINAL TO ASSIST IN THE DSCNT. THE CAPT POINTED OUT COMPANY TFC ON A DOGLEG TO FINAL FOR RWY 1L. HE RECOMMENDED A TURN TO FINAL TO ENSURE WE DIDN'T OVERSHOOT. I CLICKED OFF THE AUTOPLT AND ROLLED INTO 30 DEGS OF BANK TO A DOGLEG TO FINAL. A FEW SECONDS AFTER INITIATING THE TURN; WE RECEIVED AN RA OF 'ADJUST VERT SPD.' IT COMMANDED A 0-500 VVI CLB. I LEVELED OFF AND THE RA CLRED. THE CAPT KEPT THE TFC IN SIGHT. I COULD NOT; DUE TO ITS POSITION BELOW AND TO THE L OF US WHEN ON FINAL. I CONTINUED TO SLOW AND CONFIGURE WHILE STARTING A DSCNT AGAIN. WE RECEIVED ANOTHER RA OF 'ADJUST VERTICAL SPD;' THIS TIME COMMANDING A 0-500 VVI DSCNT. I COMPLIED AND REDUCED MY DSCNT. THIS WAS CAUSING US TO GET HIGHER ON THE APCH PATH. WE CONFIGURED TO FLAPS 40 DEGS AND TRIED ANOTHER DSCNT BUT THE RA WAS STILL DIRECTING A 500 VVI DSCNT MAX -- NOT STEEP ENOUGH TO MAKE THE LNDG. WE HAD APPROX A 10-15 DEG INTERCEPT TO THE EXTENDED CTRLINE TO FINAL. WE TURNED TO PARALLEL THE RWY 1R CTRLINE; WHICH RESOLVED THE RA; BUT WE WERE TO THE R OF THE RWY. I SHALLOWED MY INTERCEPT TO FINAL OF ABOUT 2 DEGS; ESSENTIALLY AN ANGLING FINAL; WHICH KEPT THE RA CLEAR; ALLOWED US TO DSND AND HAVE A STABILIZED FINAL AT 1000 FT. TFC WAS ABOUT 1/4 MI AHEAD OF US AND LOWER. WE LANDED UNEVENTFUL. THE RESULTANT FINAL WAS SIMILAR TO AN APCH TO RWY 28R/L AT SFO. THE RWY 1L/R SEPARATION AT LAS APPEARS SIMILAR TO THAT OF RWY 28L/R AT SFO AND WE SHOULD CONSIDER USING SIMILAR TFC PROCS. PERHAPS GOING TO TA IN LAS; SIMILAR TO SFO; WOULD AVOID THESE CONFLICTS. ALSO; ATC COULD VECTOR OR CONSTRUCT A SHALLOW INTERCEPT TO FINAL PROC; WHILE STAGGERING THE TFC ARRIVING TO RWY 1L/R AT LAS.