UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

o

Rule 13d-1(b)

x

Rule 13d-1(c)

o

Rule 13d-1(d)

CUSIP No. 894174101

1.

Names of Reporting Persons
Hospitality Properties Trust

2.

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3.

SEC Use Only

4.

Citizenship or Place of Organization
Maryland

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
1,540,000

6.

Shared Voting Power
0

7.

Sole Dispositive Power
1,540,000

8.

Shared Dispositive Power
0

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
1,540,000

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  o

11.

Percent of Class Represented by Amount in Row (9)
9.6%

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 894174101

1.

Names of Reporting Persons
Reit Management & Research LLC

2.

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3.

SEC Use Only

4.

Citizenship or Place of Organization
Delaware

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
0

6.

Shared Voting Power
0

7.

Sole Dispositive Power
0

8.

Shared Dispositive Power
0

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
0

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  x

11.

Percent of Class Represented by Amount in Row (9)
0%

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 894174101

1.

Names of Reporting Persons
Reit Management & Research Trust

2.

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3.

SEC Use Only

4.

Citizenship or Place of Organization
Massachusetts

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
0

6.

Shared Voting Power
0

7.

Sole Dispositive Power
0

8.

Shared Dispositive Power
0

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
0

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  x

11.

Percent of Class Represented by Amount in Row (9)
0%

12.

Type of Reporting Person (See Instructions)
OO

CUSIP No. 894174101

1.

Names of Reporting Persons
Barry M. Portnoy

2.

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3.

SEC Use Only

4.

Citizenship or Place of Organization
United States

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
28,911.6

6.

Shared Voting Power
0

7.

Sole Dispositive Power
28,911.6

8.

Shared Dispositive Power
0

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
28,911.6

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  x

11.

Percent of Class Represented by Amount in Row (9)
Less than 1%

12.

Type of Reporting Person (See Instructions)
IN

CUSIP No. 894174101

1.

Names of Reporting Persons
Adam D. Portnoy

2.

Check the Appropriate Box if a Member of a Group (See Instructions)

(a)

o

(b)

o

3.

SEC Use Only

4.

Citizenship or Place of Organization
United States

Number of
Shares
Beneficially
Owned by
Each
Reporting
Person With

5.

Sole Voting Power
6,263.3

6.

Shared Voting Power
0

7.

Sole Dispositive Power
0

8.

Shared Dispositive Power
0

9.

Aggregate Amount Beneficially Owned by Each Reporting Person
6,263.3

10.

Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)  x

11.

Percent of Class Represented by Amount in Row (9)
Less than 1%

12.

Type of Reporting Person (See Instructions)
IN

Item 1.

(a)

Name of Issuer
TravelCenters of America LLC

(b)

Address of Issuer’s Principal Executive Offices
24601 Center Ridge Road
Suite 200
Westlake, OH  44145-5639

Item 2.

(a)

Name of Person Filing
This Statement is filed on behalf of each of the following persons (collectively, the “Reporting Persons”):

(1)           Hospitality Properties Trust (“HPT”)

(2)           Reit Management & Research LLC (“RMR”) (the manager of HPT)

(3)           Reit Management & Research Trust (“RMR Trust”) (the sole member of RMR)

(4)           Barry M. Portnoy (a director of the Issuer, a managing trustee of HPT, the Chairman and a director of RMR, and the Chairman, majority beneficial owner and a trustee of RMR Trust)

(5)           Adam D. Portnoy (a managing trustee of HPT, the President and Chief Executive Officer and a director of RMR, and the President and Chief Executive Officer, a beneficial owner and a trustee of RMR Trust)

(b)

Address of Principal Business Office or, if none, Residence
The address of each Reporting Person is:

400 Center Street

Newton, MA  02458

(c)

Citizenship
HPT is a Maryland real estate investment trust.

RMR is a Delaware limited liability company.

RMR Trust is a Massachusetts business trust.

Barry M. Portnoy is a United States citizen.

Adam D. Portnoy is a United States citizen.

(d)

Title of Class of Securities
Common Shares, no par value

(e)

CUSIP Number
894174101

Item 3.

If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
Not applicable

(a)

o

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b)

o

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c)

o

Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d)

o

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e)

o

An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);

(f)

o

An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

(g)

o

A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);

(h)

o

A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

o

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

o

Group, in accordance with §240.13d-1(b)(1)(ii)(J).

Item 4.

Ownership

Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.

(a)

Amount beneficially owned:   

HPT beneficially owns 1,540,000 Common Shares of the Issuer, which it acquired pursuant to a rent deferral agreement with the Issuer, entered into on August 11, 2008.

Neither RMR nor RMR Trust holds any Common Shares of the Issuer.  RMR, as manager of HPT, and RMR Trust, as the sole member of RMR, may, under applicable regulatory definitions, be deemed to beneficially own (and have shared voting and dispositive power over) the 1,540,000 Common Shares beneficially owned by HPT, but each disclaims such beneficial ownership.

Mr. Barry Portnoy beneficially owns 28,911.6 Common Shares of the Issuer (including 16,314.9 shares held by a corporation of which he is the sole stockholder).  Mr. Adam Portnoy beneficially owns 6,263.3 Common Shares of the Issuer (of which 3,200 are subject to vesting requirements and will become fully vested, subject to the lapse of certain contingencies, annually through 2012).  In their respective positions with RMR and RMR Trust described in Item 2(a) above, Mr. Barry Portnoy and Mr. Adam Portnoy may also be deemed to beneficially own (and have shared voting and dispositive power over) the 1,540,000 Common Shares beneficially owned by HPT, but each disclaims such beneficial ownership.

(b)

Percent of class:   

HPT beneficially owns approximately 9.6% of the Issuer’s Common Shares.

Each of Mr. Barry Portnoy and Mr. Adam Portnoy beneficially owns less than 1% of the Issuer’s Common Shares, and RMR and RMR Trust beneficially own none of the Issuer’s Common Shares.  Reference is made to Item 4(a) above as to the Issuer’s Common Shares beneficially owned by HPT that may, under applicable regulatory definitions, be deemed to be beneficially owned by RMR, RMR Trust, Mr. Barry Portnoy or Mr. Adam Portnoy.  If all such Common Shares were beneficially owned by such persons, their respective percentage beneficial ownership of the Issuer’s Common Shares would be approximately 9.6%, 9.6%, 9.8% and 9.6%.

(c)

Number of shares as to which the person has:

(i)

Sole power to vote or to direct the vote   

HPT:                                      1,540,000

RMR:                                     0

RMR Trust:                          0

Barry M. Portnoy:               28,911.6

Adam D. Portnoy:                6,263.3

(ii)

Shared power to vote or to direct the vote    

HPT:                                      0

RMR:                                     0

RMR Trust:                          0

Barry M. Portnoy:               0

Adam D. Portnoy:                0

(iii)

Sole power to dispose or to direct the disposition of   

HPT:                                      1,540,000

RMR:                                     0

RMR Trust:                          0

Barry M. Portnoy:               28,911.6

Adam D. Portnoy:                6,263.3

(iv)

Shared power to dispose or to direct the disposition of   

HPT:                                      0

RMR:                                     0

RMR Trust:                          0

Barry M. Portnoy:               0

Adam D. Portnoy:                0

Reference is made to Item 4(a) above as to the Issuer’s Common Shares beneficially owned by HPT which may, under applicable regulatory definitions, be deemed to be beneficially owned by RMR, RMR Trust, Mr. Barry Portnoy or Mr. Adam Portnoy.

Item 5.

Ownership of Five Percent or Less of a Class
Not applicable.

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following   o.

Item 6.

Ownership of More than Five Percent on Behalf of Another Person
Not applicable.

Item 7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company or Control Person
Not applicable.

Item 8.

Identification and Classification of Members of the Group
Not applicable.

Item 9.

Notice of Dissolution of Group
Not applicable.

Item 10.

Certification

By signing below, I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

Dated: August 21, 2008

HOSPITALITY PROPERTIES TRUST

/s/ Mark Kleifges

Signature

Mark Kleifges, Treasurer and Chief Financial Officer

Name/Title

REIT MANAGEMENT & RESEARCH LLC

/s/ Adam D. Portnoy

Signature

Adam D. Portnoy, President and Chief Executive Officer

Name/Title

REIT MANAGEMENT & RESEARCH TRUST

/s/ Adam D. Portnoy

Signature

Adam D. Portnoy, President and Chief Executive Officer

Name/Title

BARRY M. PORTNOY

/s/ Barry M. Portnoy

ADAM D. PORTNOY

/s/ Adam D. Portnoy

ATTENTION

Intentional misstatements or omissions of fact constitute Federal Criminal Violations (See 18 U.S.C. 1001).

Exhibit

Description

99(a)

Joint Filing Agreement, dated as of August 21, 2008, by and among Hospitality Properties Trust, Reit Management & Research LLC, Reit Management & Research Trust, Barry M. Portnoy and Adam D. Portnoy.