- Amended Statement of Beneficial Ownership (3/A)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Expires: February 28, 2011 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

Updike James E. Jr.

2. Date of Event Requiring Statement (MM/DD/YYYY) 2/8/2011

3. Issuer Name and Ticker or Trading Symbol

KNIGHT TRANSPORTATION INC [KNX]

(Last) (First) (Middle)

5601 WEST BUCKEYE ROAD

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director _____ 10% Owner
___ X ___ Officer (give title below) _____ Other (specify below)
Exec VP Sales and Marketing /

(Street)

PHOENIX, AZ 85043

(City) (State) (Zip)

5. If Amendment, Date Original Filed (MM/DD/YYYY)

2/8/2011

6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	1676	D

*Table II - Derivative Securities Beneficially Owned ( e.g.* , puts, calls, warrants, options, convertible securities)**
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)
Employee Stock Option (right to buy)	8/7/2010 ⁽¹⁾	8/6/2013	Common Stock	5625 ⁽¹⁾	$11.4356 ⁽¹⁾	D
Employee Stock Option (right to buy)	3/19/2010 ⁽²⁾	3/18/2014	Common Stock	6750 ⁽²⁾	$10.5378 ⁽²⁾	D
Employee Stock Option (right to buy)	4/26/2010 ⁽³⁾	4/25/2015	Common Stock	6000 ⁽³⁾	$14.48 ⁽³⁾	D
Employee Stock Option (right to buy)	5/18/2010 ⁽⁴⁾	5/17/2016	Common Stock	3750 ⁽⁴⁾	$18.75 ⁽⁴⁾	D
Employee Stock Option (right to buy)	5/25/2010 ⁽⁵⁾	5/24/2017	Common Stock	4000 ⁽⁵⁾	$18.20 ⁽⁵⁾	D
Employee Stock Option (right to buy)	2/28/2011 ⁽⁶⁾	2/27/2018	Common Stock	10000 ⁽⁶⁾	$14.79	D
Employee Stock Option (right to buy)	5/22/2011 ⁽⁷⁾	5/21/2018	Common Stock	5000 ⁽⁷⁾	$17.29 ⁽⁷⁾	D
Restricted Stock Unit	⁽⁸⁾	⁽⁸⁾	Common Stock	30000 ⁽⁸⁾	⁽⁸⁾	D

Explanation of Responses:
( 1)	Mr. Updike was granted an option to purchase 5,625 shares of stock at the grant price of $11.4356 per share on August 7, 2003 of which 4,050 shares have been exercised and 1,575 are vested and exercisable.
( 2)	Mr. Updike was granted an option to purchase 6,750 shares of stock at the grant price of $10.5378 per share on March 19, 2004 of which 5,400 shares are currently vested and exercisable with the remaining shares vesting as follows: 1,350 shares on March 19, 2011.
( 3)	Mr. Updike was granted an option to purchase 6,000 shares of stock at the grant price of $14.48 per share on April 26, 2005 of which 3,600 shares are currently vested and exercisable with the remaining shares vesting as follows: 1,200 shares annually, with the next scheduled vesting on April 26, 2011, and each anniversary thereafter, until fully vested.
( 4)	Mr. Updike was granted an option to purchase 3,750 shares of stock at the grant price of $18.75 per share on May 18, 2006 of which 1,500 shares are currently vested and exercisable with the remaining shares vesting as follows: 750 shares annually, with the next scheduled vesting on May 18, 2011, and each anniversary thereafter, until fully vested.
( 5)	Mr. Updike was granted an option to purchase 4,000 shares of stock at the grant price of $18.20 per share on May 25, 2007 of which 800 shares are currently vested and exercisable with the remaining shares vesting as follows: 800 shares annually, with the next scheduled vesting on May 25, 2011, and each anniversary thereafter, until fully vested.
( 6)	Mr. Updike was granted an option to purchase 10,000 shares of stock at the grant price of $14.79 per share on February 29, 2008, to vest as follows: 2,000 shares annually, beginning on February 28, 2011, and each anniversary thereafter, until fully vested.
( 7)	Mr. Updike was granted an option to purchase 5,000 shares at the grant price of $17.29 per share on May 22, 2008, to vest as follows: 20% each year beginning on May 22, 2011, and each anniversary thereafter, until fully vested.
( 8)	On October 30, 2009, Mr. Updike was granted 30,000 Restricted Stock Units, with a vesting schedule as follows: six percent (6%) on January 31, 2011; five percent (5%) respectively on January 31, 2012, January 31, 2013, January 31, 2014 and January 31, 2015; six (6%) percent on January 31, 2016; seven (7%) percent on January 31, 2017; eight (8%) on January 31, 2018; nine (9%) percent on January 31, 2019; ten percent (10%) on January 31, 2020; eleven (11%) percent on January 31, 2021; twelve percent (12%) on January 31, 2022; and eleven percent (11%) on January 31, 2023. Stock is issued when and as vested. Each restricted stock unit represents a contingent right to receive one share of KNX common stock.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Updike James E. Jr. 5601 WEST BUCKEYE ROAD PHOENIX, AZ 85043			Exec VP Sales and Marketing

Signatures
/s/ James E. Updike, Jr.		3/15/2011
^** Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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