0379-3982 0379-3982 S0379-39822017000100079 10.18845/tm.v30i1.3087 Costa Rica Costa Rica 00 03 2017 00 03 2017 30 1 79 89

[ 1 ] 2004 52 4 4 [ 2 ] 2012 5 ed [ 3 ] 1997 [ 4 ] 2006 21 2 2 [ 5 ] 2000 [ 6 ] 2010 2 ed [ 7 ] AASHTO 2011 [ 8 ] 2013 [ 9 ] 2012 [ 10 ] 1999 125 7 7 766-75 [ 11 ] 2001 15 1 1 1-32 [ 12 ] 1990 7 247-54