Annex 3A: Guidelines for Local Gravel Road Rehabilitation 450 be concise, meaningful, consistent, and the design and placement need to be coordinated with the road geometric design. The signs according to their use are classiifed into the following groups: • Regulatory signs (Type R) • Warning signs (Type W) • Guide signs or informative sign (Type W) • Signs for expressways (Type GE) • Signs for special purposes (Type S), and • Hazard markers (Type HM) Three (3) of the group of signs above - regulatory signs, warning signs, and guide signs or Informative signs are relevant to local gravel roads. Access to roadside properties Culverts should be constructed to carry water in ditches beneath side roads and under private accesses. The length of the culverts should be the same as the size of the access gate of the private property. Soil around the culvert should be compacted by hand in layers not thicker than 15 mm (World Bank, 2011). Compliance with legislation All safety and industrial health legislation including, without limitation, the rules and regulations of the Republic of the Philippines and the authorities having jurisdiction should be followed. All requirements of the appropriate agencies that govern irrigation and drainage facilities should be followed. All current environmental laws and regulations, be they national or local, but not limited to the following should be observed: a. Noise b. Vibration c. Air pollution d. Water contamination e. Solid waste disposal f. Liquid waste disposal g. Sanitary conditions (water supply, and sewerage) h. Protection of the traveling public