B737-800 captain reported the DRLLR5 iah RNAV arrival chart is cluttered and difficult to read.

Attributes
ACN	1512588
Time
Date	201801
Local Time Of Day	1801-2400
Place
Locale Reference	IAH.Airport
State Reference	TX
Environment
Light	Dusk
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Descent
Route In Use	STAR DRLLR5
Flight Plan	IFR
Person 1
Function	Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	No Specific Anomaly Occurred All Types

Narrative:

DRLLR5 RNAV charted altitudes for 26L 26R transitions are different. There is excessive data near these altitudes and we came within a hair of using the incorrect altitude.

Original NASA ASRS Text

Title: B737-800 Captain reported the DRLLR5 IAH RNAV arrival chart is cluttered and difficult to read.

Narrative: DRLLR5 RNAV charted altitudes for 26L 26R transitions are different. There is excessive data near these altitudes and we came within a hair of using the incorrect altitude.

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.