 In 1983 , the Rhode Island Department of Transportation ( RIDOT ) began construction of the new segment of Route 4 between exits 5 and 6 . The project , which ultimately went over budget at $ 24 million ( equivalent to $ 52 million in 2016 ) ) , was financed from a $ 63 million federal grant . In 1986 , during excavation for the new right @-@ of @-@ way , the Department of Transportation found archeological items from the Narragansett Indians dating from about 2 @,@ 000 to 4 @,@ 500 years prior . Although the findings were not centralized in the area , this caused delays for the extension of the freeway . On August 6 , 1988 , RIODT completed construction and performed a ribbon @-@ cutting ceremony for the new highway . 
 In 1983 , the Rhode Island Department of Transportation ( RIDOT ) began construction of the new segment of Route 4 between exits 5 and 6 . The project , which ultimately went over budget at $ 24 million ( equivalent to $ 52 million in 2016 ) ) , was financed from a $ 63 million federal grant . In 1986 , during excavation for the new right @-@ of @-@ way , the Department of Transportation found archeological items from the Narragansett Indians dating from about 2 @,@ 000 to 4 @,@ 500 years prior . Although the findings <a href='uninflect' title='1'><mark>were</mark></a> not centralized in <a href='None' title='2'><mark>the</mark></a><a href='negative_concord' title='3'><mark>area</mark></a> , this caused delays for the extension of the freeway . On August 6 , 1988 , RIODT completed construction and performed a ribbon @-@ cutting ceremony for the new highway . 
In 1983 , the Rhode Island Department of Transportation ( RIDOT ) began construction of the new segment of Route 4 between exits 5 and 6 . The project , which ultimately went ova budget at $ 24 million ( equivalent to $ 52 million in 2016 ) ) , was financed from a $ 63 million federal grant . In 1986 , durin excavation for the new rite @-@ of @-@ way , the Department of Transportation found archeological items from the Narragansett Indians dating from about 2 @,@ 000 to 4 @,@ 500 yrs prior . Although the findings was not centralized in no area , dis caused delays for the extension of da freeway . On August 6 , 1988 , RIODT completed construction and performed a ribbon @-@ cutting ceremony for the new highway .