Carj crew cleared runway via a reverse high speed turnoff, which was prohibited.

Attributes
ACN	502799
Time
Date	200102
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : iah.airport
State Reference	TX
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 240 flight time total : 15000 flight time type : 2400
ASRS Report	502799
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 21150 flight time type : 300
ASRS Report	502330
Events
Anomaly	incursion : taxiway non adherence : clearance non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After landing on runway 8 at iah, I was unable to clear the runway at taxiway nk. I was instructed by tower 'if unable to clear at next taxiway, expedite to taxiway nn.' this was confusing, as I thought the next taxiway was taxiway nl. I cleared at the reverse high speed. In my mind the 'next' taxiway was taxiway nl. My speed was slow enough so I exited. At iah, using the reverse high speed is prohibited. I felt the quick last second directions by ATC were confusing at best. I was also trying to clear the runway as quickly as possibly because of traffic on short final. A caution note on chart 20-9 for iah is the only reference to reverse high speed turnoffs. It is not on the ATIS. While I did miss the caution note, ATC instructions were confusing.

Original NASA ASRS Text

Title: CARJ CREW CLRED RWY VIA A REVERSE HIGH SPD TURNOFF, WHICH WAS PROHIBITED.

Narrative: AFTER LNDG ON RWY 8 AT IAH, I WAS UNABLE TO CLR THE RWY AT TXWY NK. I WAS INSTRUCTED BY TWR 'IF UNABLE TO CLR AT NEXT TXWY, EXPEDITE TO TXWY NN.' THIS WAS CONFUSING, AS I THOUGHT THE NEXT TXWY WAS TXWY NL. I CLRED AT THE REVERSE HIGH SPD. IN MY MIND THE 'NEXT' TXWY WAS TXWY NL. MY SPD WAS SLOW ENOUGH SO I EXITED. AT IAH, USING THE REVERSE HIGH SPD IS PROHIBITED. I FELT THE QUICK LAST SECOND DIRECTIONS BY ATC WERE CONFUSING AT BEST. I WAS ALSO TRYING TO CLR THE RWY AS QUICKLY AS POSSIBLY BECAUSE OF TFC ON SHORT FINAL. A CAUTION NOTE ON CHART 20-9 FOR IAH IS THE ONLY REF TO REVERSE HIGH SPD TURNOFFS. IT IS NOT ON THE ATIS. WHILE I DID MISS THE CAUTION NOTE, ATC INSTRUCTIONS WERE CONFUSING.

Data retrieved from NASA's ASRS site as of July 2007 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.