Well this being the case again I am posting my analysis of the bus routes("G" Routes being the Big-10 routes). This is the overview of the bus routes that are runing in Bangalore City operated by BMTC.
There is one way by which we can understand bus routes of Bangalore especially red board routes. Just my analysis of the various red boards . Going clockwise:
Kanakapura road: 211-217 going atleast upto Jaraganahalli/Yechanahalli(G-5 corporation to Kaggalipura)(215C,D,E,H,M,Y,CA via Jayanagar 4th block and J.P.Nagar 1st phase)
Mysore Road: 218-234 going atleast upto rajarajeshwari nagar gate(G-6 Shantinagar bus stand to Kengeri Satellite Town)(222D,M via Banashankari and Uttarahalli)
B/w Mysore road and magadi road: 235-239 wil go atleast to chandra layout via MCTC
Magadi road: 240-249 series go atleast to Sunkadgatte(248 via Vijayanagar to sunkadgatte)(G-7 Majestic to Gollarahatti)
Tumkur road:250-265 series going atleast to Jalahalli cross.(G-8 BRV Parade Ground to Nelamangla)
B/w Tumkur and Bellary road: 266-275 series going atleast to Mathikere/Kuvempu circle(276 follows same but go via New BEL road and not mathikere)
Bellary road(Towards Doddaballpura): 277-289 series towards Doddballapura and 297-299 series towards Devanahalli touching atleast hebbal. 401,402,404,406 going to Yelahanka satellite towns(278's and 279's turn at Ganganagar to Bhoopasandra/Nagshettyhalli. Buses from Shivajinagar come via R.T.Nagar to Hebbal)(G-9 BRV parade Ground to Yelahanka)
Nagawara Road: 290-292 series(G-11 Corporation to RK Hegde Nagar)
Hennur road: 293-296 series going atleast to Lingarajapuram(G-12 Indian Express to Bagalur)
Devanahalli Road: 297-299 series going upto Chikkajala
Banaswadi road:300-301 series atleast to Banaswadi
Kammanahalli: 302 series
Old madras road: 303-319 series all except 314 series going to K.R.Puram. 314 goes to BEML/CV Raman nagar/DRDO.Also 380-383 series go to K.R.Puram/hosakote(G-12 Trinity Circle to K.R.Puram)(Note: 319's go to ITPL via K.R.Puram)
Old Airport Road:320-339 going atleast upto HAL(G-1 MG Road to Kadugodi)
Sarjapur road: 340-342 series going atleast upto Agara(G-3 Mayo Hall to Sarjapura)
Hosur Road: 343-362 series going atleast upto Madiwala(Silk board if the bus comes via Jayanagar BTM like 343B,356Q,348B,348G etc.)(G-2 Brigade Road to Electronic City)
Bannerghatta Road: 363-372 series going atleast upto Bilekahalli.(364 series except 364G and 369,run via Jayanagar to Eastend and then go to Bilekahalli)(G-4 Brigade Road to Bannerghatta National Park)
The circle is complete.
Black board:
1:Jayanagar to Yeshvantapur via Gandhi bazaar,market
2 series: Majestic to J.P.Naga 1st/6th phases
3 series:Jayanagar to Hanumanthanagar
7 series: Jayanagar to Indiranagar
11-14: Banashankari bus stand
15series: K.R.Road
16-20:Jayanagar 9th block
24,25,27:BTM
24E,25E,27E,:J.P.Nagar 3rd phase
28,29:J.P.Nagar 6th phase
30-32 series:N.R.Colony/thyagarajanagar
33,34 series: Hanumanthanagar
36,37 series:Srinagar/Girinagar
43-45 series:Hanumanthanagar
60-65 series:Vijayanagar
75 series: malleshwaram to vijayanagar
90-94C: Yeshvantapur
95-96series: Kamalanagar via Malleshwaram circle
98,99:Malleshwaram 18th cross
100-104:Sadhashivanagar
107,108 series:R.T.Nagarand Ganganagar
110-114:Vasanthanagar/J.C.Nagar
129:Majestic o shivajinagar
131-139:Indiranagar
140-146:Vivveknagar/austin town
150:Market to Shivajinagar
161-166:Dairy Circle(Except 164)
164-165 Adugodi
168: Tavarekere/Jai Bheema Nagar
169:Jeevanhalli to Kurubarahalli via Shivajinagar
170-173A:Koramangla
176:Kaval Byrasandra/RT nagar to Vijayanagar via Vyalikaval,malleshwaram circle
180:Kaval Byrasandra to K.H.B colony via Yeshvantapur
181:Jayanagar to Bheemajyothinagar via market
182:shivajinagar to padmanabhanagar
183:Shivajinagar circle via market,kathriguppe,Jayanagar
189:J.P.Nagar 3rd phase to Mahalakshmi layout
190:Srinagar to jeevanbhimanagar