referring initially to fig1 , there is illustrated a reduced top plan view of a rack track for remote control toy vehicles 500 in accordance with the present invention , generally designated as 20 . race track 20 includes a plurality of interlocking mats 22 , each mat 22 has a top surface 24 . in an embodiment of the invention mats 22 are approximately 50 cm × 50 cm and have a thickness t of about 14 mm ( refer to fig7 ). also in an embodiment of the invention , mats 22 are fabricated from a polymer foam such as ethylene vinyl acetate ( eva ). mats 22 have borders which have teeth 26 which interlock with adjacent mats ( refer to fig2 – 5 , 12 , and 15 ). in fig1 , for simplicity the interlocking teeth 26 have been omitted . top surface 24 , and bottom surface 25 ( refer to fig1 ) can have one of three surface textures ( refer also to fig1 and the discussion pertaining thereto ). a side rail 28 ( shown by wide dark line ) is attached to top surface 24 of each mat 22 and extends upwardly therefrom , each side rail 28 and mat 22 pair forming a race track segment 30 ( refer also to fig6 – 11 , and 13 ). in a preferred embodiment of the invention , side rails 28 are removably attached to mats 22 . it is noted that race track segments 30 come in different mat 22 and side rail 28 configurations ( refer to fig6 – 11 , and 13 ). in an embodiment of the invention , side rails 28 have a height h of about 3 cm ( refer to fig7 ). race track segments 30 are arranged so that race track 20 has a perimeter p which is completely bordered by side rails 28 . as such , when a remote control toy vehicle 500 contacts a side rail 28 , because of the side rails height h , the vehicle 500 is deflected away from the side rail 28 and back toward the interior of race track 20 . now referring to fig2 – 5 , there are illustrated top plan views of first through fourth types of mats 22 . as may be seen from fig1 , each type of mat is useful for constructing a particular portion of race track 20 . fig2 is a first type of mat 22 which has three interlockable sides and one straight side . first type of mat 22 is used create the first configuration race track segment 30 shown in fig6 . first type of mat 22 has two holes 32 which receive connectors 50 ( refer to fig1 ) that attach a side rail 28 to a mat 22 . it is noted that each mat 22 has at least one hole 32 for connecting its associated side rail 28 . fig3 is a second type of mat 22 which has three interlockable sides and one straight side . second type of mat 22 is used create the second configuration race track segment 30 shown in fig8 . second type of mat 22 has three holes 32 which receive connectors 50 ( refer to fig1 ) that attach a convex side rail 28 to a mat 22 . fig4 is a third type of mat 22 which has two interlockable sides and a quarter circle side . third type of mat 22 is used create the third configuration race track segment 30 shown in fig1 . third type of mat 22 has three holes 32 which receive connectors 50 ( refer to fig1 ) that attach a quarter circle side rail 28 to a mat 22 . fig5 is a fourth type of mat 22 which has four interlockable sides . fourth type of mat 22 is used create the fourth configuration race track segment 30 shown in fig1 . fourth type of mat 22 has one hole 32 which receives a connector 50 ( refer to fig1 ) that attaches a quarter circle side rail 28 to a mat 22 . referring now to fig6 , there is illustrated a top plan view of a first configuration race track segment 30 . mat 22 is substantially square and has three interlockable sides ( sides that selectively interlock with an adjacent race track segment 30 ) and one straight side . side rail 28 is straight and is disposed along the straight side of mat 22 . two connectors 50 attach side rail 28 to mat 22 . first configuration race track segment 30 is positionable along either the perimeter p of race track 20 or in the interior i of race track 20 . the interior of race track 20 is defined as any mat 22 which does not define the perimeter p of race track 20 . for example , selected race track segments 30 designated with an i in fig1 comprise the interior of race track 20 . fig7 is a side elevation view of the first configuration race track segment 30 . mat 22 has a thickness t , and side rail 28 has a height h . referring now to fig8 , there is illustrated a top plan view of a second configuration race track segment 30 . mat 22 is substantially square and has three interlockable sides and one straight side . side rail 28 is convex and is disposed along the straight side of mat 22 . three connectors 50 attach side rail 28 to mat 22 . second configuration race track segment 30 is positionable along either the perimeter p of race track 20 or in the interior i of race track 20 . second configuration race track segment 30 serves as a “ bumper ” for the toy vehicles 500 . fig9 is a side elevation view of the second configuration race track segment 30 . referring now to fig1 , there is illustrated a top plan view of a third configuration race track segment 30 . mat 22 has two perpendicular interlockable sides and a quarter circle side . side rail 28 is curved and disposed along the quarter circle side of mat 22 forming a curved outside corner . three connectors 50 attach side rail 28 to mat 22 . third configuration race track segment 30 is only positionable along the perimeter p of race track 20 at a corner of the race track 20 . referring now to fig1 , there is illustrated a top plan view of a fourth configuration race track segment 30 . mat 22 is substantially square and has four interlockable sides and four corners . side rail 28 is a quarter circle ( inside corner ) and is disposed in one of the corners of mat 22 . one connector 50 attaches side rail 28 to mat 22 . fourth configuration race track segment 30 is only positionable in the interior i of race track 20 . fig1 is a top plan view of a fifth type of mat 22 which has four interlockable sides . fifth type of mat 22 is used create the fifth configuration race track segment 30 shown in fig1 . fifth type of mat 22 has two holes 32 disposed on a central axis 29 which receive connectors 50 ( refer to fig1 ) that attach a side rail 28 to a mat 22 . referring now to fig1 , there is illustrated a top plan view of a fifth configuration race track segment 30 . mat 22 is substantially square and has four interlockable sides and a central axis 29 . side rail 28 is straight and is disposed along central axis 29 of mat 22 . two connectors 50 attach side rail 28 to mat 22 . fifth configuration race track segment 30 is only positionable in the interior i of race track 20 ( refer to fig1 ). it is noted that in fig6 , 8 , 10 , 11 , and 13 each side rail 28 has a first end 29 and an opposite second end 31 . each first end 29 of each side rail 28 is interlockable with an adjacent side rail 28 , and each second end 31 of each side rail 28 is interlockable with another adjacent side rail 28 . in the shown embodiment , first ends 29 have a tooth 33 , and second ends 31 have a tooth - receiving cavity 35 . fig1 is an enlarged exploded side elevation view in direction 14 — 14 of fig6 . each mat 22 has at least one hole 32 , and each side rail 28 has at least one corresponding hole 27 . connector 50 is received by the at least one hole 32 in mat 22 and hole 27 in side rail 28 . holes 32 and 27 have a first diameter d 1 . connector 50 includes a first member 51 having a hollow cylindrical body having female threads , the body having an outside second diameter d 2 which is approximately equal to first diameter d 1 of holes 32 and 27 . in an embodiment of the invention , connector 50 is plastic . first member 51 has a closed end having a first flange 53 having a third diameter d 3 which is greater than first diameter d 1 . connector 50 includes a second member 52 having male threads which selectively engage the female threads of first member 51 . second member 52 has a second flange 55 having a fourth diameter d 4 which is also greater than first diameter d 1 . wherein first member 51 may be inserted through holes 32 and 28 of mat 22 and side rail 28 respectively , and the male and female threads engaged and tightened so that first 53 and second 55 flanges abut mat 22 and side rail 28 respectively . fig1 a top plan view of a sixth type of mat 22 . this type of mat 22 has no holes , and can only be used in the interior i of race track 20 . fig1 is an enlarged side elevation view of a mat 22 having two different racing surfaces . top surface 24 of mat 22 can have one of a three different textures , ( 1 ) smooth ( shown in the fig . ), ( 2 ) roughened , and ( 3 ) bumpy . the smooth texture is useful for most toy vehicles . the bumpy texture which is useful for off - road vehicles . the roughened surface is a smooth surface which has been scraped with a blade to roughen the surface and thereby provide better traction for the toy vehicles . each mat 22 also has a bottom surface 25 having a texture , the bottom texture also being one of ( 1 ) smooth , ( 2 ) roughened , and ( 3 ) bumpy ( shown in the fig .). in an embodiment of the invention , the bottom surface 25 texture is different from the top surface 24 texture . this feature allows one set of mats 22 to be reversed and therefore provide two different racing surfaces . fig1 is a reduced top plan view of a second rack track 20 configuration . in terms of use , a method for constructing a race track 20 for remote control toy vehicles 500 , includes : ( a ) providing a plurality of interlockable mats 22 , each mat 22 having a top surface 24 ; ( b ) providing a corresponding plurality of side rails 28 , a side rail 28 attached to the top surface 24 of each mat 22 and extending upwardly therefrom , each side rail 28 and mat 22 pair forming a race track segment 30 ; and , ( c ) arranging the race track segments 30 by interlocking the mats 22 to form a race track 20 , the arrangement being made such that the race track 20 has a perimeter p which is completely bordered by side rails 28 . in ( b ), a first configuration race track segment 30 including : a mat 22 having three interlockable sides and one straight side ; a straight side rail 28 disposed along the straight side of mat 22 ; and , first configuration race track segment 30 positionable along either the perimeter p of race track 20 or in the interior i of race track 20 . in ( b ), a second configuration race track segment 30 including : a mat 22 having three interlockable sides and one straight side ; a convex side rail 28 disposed along the straight side of mat 22 ; and , second configuration race track segment 30 positionable along either the perimeter p of race track 22 or in the interior i of race track 20 . in ( b ), a third configuration race track segment 30 including : a mat 22 having two perpendicular interlockable sides and a quarter circle side ; a curved side rail 28 disposed along the quarter circle side of mat 22 ; and , third configuration race track segment 30 only positionable along the perimeter p of race track 20 . in ( b ), a fourth configuration race track segment 30 including : a mat 22 having four interlockable sides and four corners ; a quarter circle side rail 28 which is disposed in one of the corners of mat 22 ; and , fourth configuration race track segment 30 only positionable in the interior i of race track 20 . in ( b ), a fifth configuration race track segment 30 including : a mat 22 being having four interlockable sides ; a straight side rail 28 disposed along a central axis 29 of mat 22 ; and , fifth configuration race track segment 30 only positionable in the interior i of race track 20 . in ( b ), side rails 28 removably attached to mats 22 . in ( a ), each mat 22 having at least one hole 32 ; in ( b ), each side rail 28 having at least one hole 33 ; and , in ( b ), a connector 50 received by the at least one hole 32 in mat 22 and the at least one hole 33 in side rail 28 , connector 50 removably connecting each side rail 28 to each mat 22 . in ( b ), each side rail 28 having a first end 29 and an opposite second end 31 ; in ( b ), the first end 29 of each side rail 28 interlockable with an adjacent side rail 28 , and the second end 31 of each side rail 28 interlockable with another adjacent side rail 28 ; in ( b ), interlocking the first end 31 of each side rail 28 with an adjacent side rail 28 ; and , in ( b ), interlocking the second end 33 of each side rail 28 with another adjacent side rail 28 . top surface 24 having a texture , the texture being one of ( 1 ) smooth , ( 2 ) roughened , and ( 3 ) bumpy . each mat 22 having a bottom surface 25 having a texture , the texture being one of ( 1 ) smooth , ( 2 ) roughened , and ( 3 ) bumpy ; and , the texture of the bottom surface 25 being different from the texture of the top surface 24 . the preferred embodiments of the invention described herein are exemplary and numerous modifications , variations , and rearrangements can be readily envisioned to achieve an equivalent result , all of which are intended to be embraced within the scope of the appended claims .
a race track for remote control toy vehicles includes a plurality of interlocking race track segments of several different configurations . each race track segment includes a removable side rail . the race track is arranged so that the perimeter of the race track is completely bordered by side rails . as such , the remote control toy vehicles are contained within the race track . three race track surfaces are provided to simulate various racing conditions .