B737-500 captain reports lack of taxiway signs at boi as contributing to a taxiway incursion.

Attributes
ACN	808546
Time
Date	200810
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : boi.airport
State Reference	ID
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-500
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
Experience	flight time last 90 days : 138 flight time type : 7500
ASRS Report	808546
Person 2
Affiliation	government : faa
Function	controller : ground
Events
Anomaly	incursion : taxiway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued advisory controller : issued new clearance
Supplementary
Problem Areas	Airport Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

Cleared via alpha taxiway to gate. Poor to no markings on field at exit of runway 10L and taxiway D for use of alpha vs ramp. Add airport markers at the intersection for txwys on and approaching so as to be consistent with other airports.callback conversation with reporter revealed the following information: this is not a very busy airport and the taxi error did not seem to elicit much of a response from the ground controller; except to change the taxi route. A proper sign would be beneficial; however.

Original NASA ASRS Text

Title: B737-500 CAPT REPORTS LACK OF TXWY SIGNS AT BOI AS CONTRIBUTING TO A TXWY INCURSION.

Narrative: CLEARED VIA ALPHA TXWY TO GATE. POOR TO NO MARKINGS ON FIELD AT EXIT OF RWY 10L AND TXWY D FOR USE OF ALPHA VS RAMP. ADD ARPT MARKERS AT THE INTXN FOR TXWYS ON AND APCHING SO AS TO BE CONSISTENT WITH OTHER ARPTS.CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THIS IS NOT A VERY BUSY ARPT AND THE TAXI ERROR DID NOT SEEM TO ELICIT MUCH OF A RESPONSE FROM THE GND CTLR; EXCEPT TO CHANGE THE TAXI RTE. A PROPER SIGN WOULD BE BENEFICIAL; HOWEVER.

Data retrieved from NASA's ASRS site as of May 2009 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.